diff --git a/include/JSystem/JMath/JMATrigonometric.h b/include/JSystem/JMath/JMATrigonometric.h
index d9178e04b..0a1a76560 100644
--- a/include/JSystem/JMath/JMATrigonometric.h
+++ b/include/JSystem/JMath/JMATrigonometric.h
@@ -2,7 +2,6 @@
 #define JMATRIGONOMETRIC_H
 
 #include "dolphin/types.h"
-#include "utility.h"
 
 extern u32 jmaSinShift;
 extern f32 *jmaSinTable;
diff --git a/include/d/actor/d_a_bk.h b/include/d/actor/d_a_bk.h
index eb33ac809..5bae046cc 100644
--- a/include/d/actor/d_a_bk.h
+++ b/include/d/actor/d_a_bk.h
@@ -228,7 +228,7 @@ public:
     void genMessage(JORMContext* ctx);
 
 public:
-    /* 0x004 */ s8 mChildID;
+    /* 0x004 */ s8 mNo;
     /* 0x005 */ u8 m005;
     /* 0x006 */ u8 m006;
     /* 0x007 */ u8 m007;
diff --git a/include/d/actor/d_a_dr.h b/include/d/actor/d_a_dr.h
index 38234a166..42a932bbd 100644
--- a/include/d/actor/d_a_dr.h
+++ b/include/d/actor/d_a_dr.h
@@ -34,7 +34,7 @@ public:
     void genMessage(JORMContext* ctx);
 
 public:
-    /* 0x04 */ s8 mChildID;
+    /* 0x04 */ s8 mNo;
     /* 0x05 */ u8 m05[0x08 - 0x05];
     /* 0x08 */ f32 mScale;
     /* 0x0C */ bool m0C;
diff --git a/include/d/actor/d_a_mozo.h b/include/d/actor/d_a_mozo.h
index d35cfb8b5..8a25d1a49 100644
--- a/include/d/actor/d_a_mozo.h
+++ b/include/d/actor/d_a_mozo.h
@@ -81,8 +81,7 @@ public:
     void genMessage(JORMContext* ctx);
 
 public:
-    /* 0x04 */ s8 mChildID;
-    /* 0x05 */ u8 m05[0x08 - 0x05];
+    /* 0x04 */ s8 mNo;
     /* 0x08 */ int m08;
     /* 0x0C */ daMozo_BeamChildHIO_c* mpBeamChild;
     /* 0x10 */ daMozo_FireChildHIO_c* mpFireChild;
diff --git a/include/d/actor/d_a_nh.h b/include/d/actor/d_a_nh.h
index e931504e0..63c695f63 100644
--- a/include/d/actor/d_a_nh.h
+++ b/include/d/actor/d_a_nh.h
@@ -110,7 +110,7 @@ public:
     void genMessage(JORMContext* ctx);
 
 public:
-    /* 0x04 */ s8 mChildID;
+    /* 0x04 */ s8 mNo;
     /* 0x08 */ hio_prm_c prm;
     /* 0x44 */ daNh_c* mpActor;
 };  // Size: 0x48
diff --git a/include/d/actor/d_a_npc_bs1.h b/include/d/actor/d_a_npc_bs1.h
index 3b2c97b3d..b24d62990 100644
--- a/include/d/actor/d_a_npc_bs1.h
+++ b/include/d/actor/d_a_npc_bs1.h
@@ -193,7 +193,7 @@ public:
 
 public:
     /* 0x000 */ // this.__vt
-    /* 0x004 */ s8 mChildId;
+    /* 0x004 */ s8 mNo;
     /* 0x008 */ int m8;
     /* 0x00C */ daNpc_Bs1_childHIO_c mChild[2];
 };  // Size: 0x94
diff --git a/include/d/actor/d_a_npc_btsw2.h b/include/d/actor/d_a_npc_btsw2.h
index dc2e89fdc..5f4dec408 100644
--- a/include/d/actor/d_a_npc_btsw2.h
+++ b/include/d/actor/d_a_npc_btsw2.h
@@ -94,7 +94,7 @@ public:
     virtual ~daNpc_Btsw2_HIO_c() {}
 
 public:
-    /* 0x04 */ s8 mChildID;
+    /* 0x04 */ s8 mNo;
     /* 0x08 */ dNpc_HIO_c mNpc;
     /* 0x30 */ s16 m30;
     /* 0x32 */ s16 m32;
diff --git a/include/d/actor/d_a_npc_kamome.h b/include/d/actor/d_a_npc_kamome.h
index 9c273a5b3..68829f1f4 100644
--- a/include/d/actor/d_a_npc_kamome.h
+++ b/include/d/actor/d_a_npc_kamome.h
@@ -52,7 +52,7 @@ public:
     void genMessage(JORMContext* ctx);
 
 public:
-    /* 0x04 */ s8 mChildID;
+    /* 0x04 */ s8 mNo;
     /* 0x08 */ hio_prm_c prm;
     /* 0x20 */ daNpc_kam_c* mpActor;
     /* 0x24 */ daNpc_kam_HIO1_c mHio1;
diff --git a/include/d/actor/d_a_npc_md.h b/include/d/actor/d_a_npc_md.h
index 766aec850..cc8ceca2c 100644
--- a/include/d/actor/d_a_npc_md.h
+++ b/include/d/actor/d_a_npc_md.h
@@ -95,7 +95,7 @@ public:
     void genMessage(JORMContext* ctx);
 
 public:
-    /* 0x004 */ s8 mChildID;
+    /* 0x004 */ s8 mNo;
     /* 0x005 */ u8 m005[0x008 - 0x005];
     /* 0x008 */ daNpc_Md_HIO2_c m008;
     /* 0x034 */ daNpc_Md_HIO3_c m034;
diff --git a/include/d/actor/d_a_obj_Ygush00.h b/include/d/actor/d_a_obj_Ygush00.h
index 37510f3b9..99bd0d7b2 100644
--- a/include/d/actor/d_a_obj_Ygush00.h
+++ b/include/d/actor/d_a_obj_Ygush00.h
@@ -41,7 +41,7 @@ public:
     void genMessage(JORMContext* ctx);
 
 public:
-    /* 0x04 */ s8 mChildID;
+    /* 0x04 */ s8 mNo;
 };
 
 #endif /* D_A_OBJ_YGUSH00_H */
diff --git a/include/d/actor/d_a_obj_quake.h b/include/d/actor/d_a_obj_quake.h
index bfb152a32..74c690e08 100644
--- a/include/d/actor/d_a_obj_quake.h
+++ b/include/d/actor/d_a_obj_quake.h
@@ -42,7 +42,7 @@ public:
     void genMessage(JORMContext* ctx);
 
 public:
-    /* 0x04 */ s8 mChildID;
+    /* 0x04 */ s8 mNo;
     /* 0x08 */ s32 field_0x08;
     /* 0x0C */ u8 field_0x0C;
     /* 0x0D */ u8 field_0x0D;
diff --git a/include/d/actor/d_a_pirate_flag.h b/include/d/actor/d_a_pirate_flag.h
index 34d76150b..227cd73fd 100644
--- a/include/d/actor/d_a_pirate_flag.h
+++ b/include/d/actor/d_a_pirate_flag.h
@@ -52,7 +52,7 @@ public:
 class daPirate_Flag_HIO_c : public JORReflexible {
 public:
     daPirate_Flag_HIO_c() {
-        mChildID = -1;
+        mNo = -1;
         m06 = 0;
         m1C = 0.0f;
         m05 = 0;
@@ -64,13 +64,13 @@ public:
         m18 = 0.45f;
     }
     virtual ~daPirate_Flag_HIO_c() {
-        mChildID = -1;
+        mNo = -1;
     }
 
     void genMessage(JORMContext* ctx);
 
 public:
-    /* 0x04 */ s8 mChildID;
+    /* 0x04 */ s8 mNo;
     /* 0x05 */ u8 m05;
     /* 0x06 */ u8 m06;
     /* 0x07 */ u8 m07;
diff --git a/include/d/actor/d_a_sail.h b/include/d/actor/d_a_sail.h
index 63baf27d1..f0ec999d8 100644
--- a/include/d/actor/d_a_sail.h
+++ b/include/d/actor/d_a_sail.h
@@ -67,20 +67,20 @@ public:
 class daSail_HIO_c : public JORReflexible {
 public:
     daSail_HIO_c() {
-        mChildID = -1;
+        mNo = -1;
         m05 = 1;
         m06 = 1;
         m10 = 0.0f;
         m07 = 0;
     }
     virtual ~daSail_HIO_c() {
-        mChildID = -1;
+        mNo = -1;
     }
 
     void genMessage(JORMContext* ctx);
 
 public:
-    /* 0x04 */ s8 mChildID;
+    /* 0x04 */ s8 mNo;
     /* 0x05 */ u8 m05;
     /* 0x06 */ u8 m06;
     /* 0x07 */ u8 m07;
diff --git a/include/d/d_jnt_hit.h b/include/d/d_jnt_hit.h
index c8208a112..a3ab4487b 100644
--- a/include/d/d_jnt_hit.h
+++ b/include/d/d_jnt_hit.h
@@ -1,7 +1,6 @@
 #ifndef D_JNT_HIT_H
 #define D_JNT_HIT_H
 
-#include "global.h"
 #include "SSystem/SComponent/c_xyz.h"
 #include "SSystem/SComponent/c_sxyz.h"
 #include "JSystem/J3DGraphAnimator/J3DModel.h"
@@ -80,8 +79,7 @@ public:
     virtual ~JntHit_HIO_c() {}
 
 public:
-    /* 0x04 */ s8 mChildID;
-    /* 0x05 */ u8 m05[0x06 - 0x05];
+    /* 0x04 */ s8 mNo;
     /* 0x06 */ s16 m06;
     /* 0x08 */ s16 m08;
     /* 0x0A */ u8 m0A[0x0C - 0x0A];
diff --git a/include/d/d_menu_option.h b/include/d/d_menu_option.h
index fd9a13bc6..353177b2b 100644
--- a/include/d/d_menu_option.h
+++ b/include/d/d_menu_option.h
@@ -102,7 +102,7 @@ public:
     void genMessage(JORMContext* ctx);
 
 public:
-    /* 0x04 */ s8 mChildID;
+    /* 0x04 */ s8 mNo;
 };  // Size: 0x08
 
 
diff --git a/include/d/d_s_play.h b/include/d/d_s_play.h
index 56ef9e31d..55346d992 100644
--- a/include/d/d_s_play.h
+++ b/include/d/d_s_play.h
@@ -34,7 +34,7 @@ public:
     void genMessage(JORMContext* ctx);
 
 public:
-    /* 0x04 */ s8 mChildID;
+    /* 0x04 */ s8 mNo;
     /* 0x05 */ u8 field_0x05;
     /* 0x06 */ u8 field_0x06;
     /* 0x07 */ u8 field_0x07[0x08 - 0x07];
@@ -61,7 +61,7 @@ public:
     void genMessage(JORMContext* ctx);
 
 public:
-    /* 0x04 */ s8 mChildID;
+    /* 0x04 */ s8 mNo;
     /* 0x05 */ u8 field_0x05;
     /* 0x06 */ u8 field_0x06;
     /* 0x07 */ u8 field_0x07;
@@ -94,7 +94,7 @@ public:
     void genMessage(JORMContext* ctx);
 
 public:
-    /* 0x04 */ s8 mChildID;
+    /* 0x04 */ s8 mNo;
     /* 0x08 */ f32 field_0x08;
     /* 0x0C */ f32 field_0x0c;
     /* 0x10 */ f32 field_0x10;
@@ -121,7 +121,7 @@ public:
     void genMessage(JORMContext* ctx);
 
 public:
-    /* 0x04 */ s8 mChildID;
+    /* 0x04 */ s8 mNo;
     /* 0x05 */ u8 mIsUpdate;
     /* 0x06 */ u8 field_0x06;
     /* 0x07 */ u8 field_0x07;
@@ -146,7 +146,7 @@ public:
     void genMessage(JORMContext* ctx);
 
 public:
-    /* 0x04 */ s8 mChildID;
+    /* 0x04 */ s8 mNo;
     /* 0x08 */ dScnPly_env_otherHIO_c mOther;
     /* 0x50 */ dScnPly_env_debugHIO_c mEnvDebug;
 };
@@ -155,7 +155,7 @@ class dScnPly_reg_HIO_c {
 public:
     virtual ~dScnPly_reg_HIO_c() {}
 
-    /* 0x4 */ s8 mChildID;
+    /* 0x4 */ s8 mNo;
     /* 0x8 */ dScnPly_reg_childHIO_c mChild[22];
 };
 
diff --git a/include/f_ap/f_ap_game.h b/include/f_ap/f_ap_game.h
index 88faef7af..daf4ccae2 100644
--- a/include/f_ap/f_ap_game.h
+++ b/include/f_ap/f_ap_game.h
@@ -16,7 +16,7 @@ public:
     void genMessage(JORMContext* ctx);
 
 public:
-    /* 0x04 */ u8 mChildID;
+    /* 0x04 */ s8 mNo;
     /* 0x05 */ u8 field_0x05;
     /* 0x06 */ u8 mDisplayMeter;
     /* 0x07 */ u8 mDisplayFlag;
diff --git a/src/d/actor/d_a_bk.cpp b/src/d/actor/d_a_bk.cpp
index 5aaca9f73..cbe758ad8 100644
--- a/src/d/actor/d_a_bk.cpp
+++ b/src/d/actor/d_a_bk.cpp
@@ -3278,7 +3278,7 @@ static BOOL daBk_Delete(bk_class* i_this) {
     }
     if (i_this->m121D) {
         hio_set = 0;
-        mDoHIO_deleteChild(l_bkHIO.mChildID);
+        mDoHIO_deleteChild(l_bkHIO.mNo);
     }
     i_this->m0350.end();
     i_this->dr.mParticleCallBack.end();
@@ -3554,7 +3554,7 @@ static s32 daBk_Create(fopAc_ac_c* i_actor) {
         }
         
         if (!hio_set) {
-            l_bkHIO.mChildID = mDoHIO_createChild("ボコちゃん", &l_bkHIO); // "Boko-chan"
+            l_bkHIO.mNo = mDoHIO_createChild("ボコちゃん", &l_bkHIO); // "Boko-chan"
             i_this->m121D = 1;
             hio_set = 1;
         }
diff --git a/src/d/actor/d_a_dr.cpp b/src/d/actor/d_a_dr.cpp
index c3983afe3..cac98dfe6 100644
--- a/src/d/actor/d_a_dr.cpp
+++ b/src/d/actor/d_a_dr.cpp
@@ -17,7 +17,7 @@ static daDr_HIO_c l_HIO;
 
 /* 000000EC-00000148       .text __ct__10daDr_HIO_cFv */
 daDr_HIO_c::daDr_HIO_c() {
-    mChildID = -1;
+    mNo = -1;
     mScale = 1.0f;
     m0C = false;
     m0E = 10*30;
@@ -205,8 +205,8 @@ static BOOL daDr_IsDelete(dr_class* i_this) {
 /* 00000A94-00000AE8       .text daDr_Delete__FP8dr_class */
 static BOOL daDr_Delete(dr_class* i_this) {
     dComIfG_resDelete(&i_this->mPhs, "Dr");
-    if (l_HIO.mChildID >= 0) {
-        mDoHIO_deleteChild(l_HIO.mChildID);
+    if (l_HIO.mNo >= 0) {
+        mDoHIO_deleteChild(l_HIO.mNo);
     }
     return TRUE;
 }
@@ -245,8 +245,8 @@ static s32 daDr_Create(fopAc_ac_c* i_actor) {
         
         daDr_setMtx(i_this);
         
-        if (l_HIO.mChildID < 0) {
-            l_HIO.mChildID = mDoHIO_createChild("ドラゴン", &l_HIO); // "Dragon"
+        if (l_HIO.mNo < 0) {
+            l_HIO.mNo = mDoHIO_createChild("ドラゴン", &l_HIO); // "Dragon"
         }
     }
     
diff --git a/src/d/actor/d_a_mozo.cpp b/src/d/actor/d_a_mozo.cpp
index 5df10c4ff..1e7423569 100644
--- a/src/d/actor/d_a_mozo.cpp
+++ b/src/d/actor/d_a_mozo.cpp
@@ -23,7 +23,7 @@ daMozo_HIO_c::daMozo_HIO_c() {
     m3C = 0.0f;
     m40 = -300.0f;
     m44 = 600.0f;
-    mChildID = -1;
+    mNo = -1;
     m08 = -1;
     mpBeamChild = &mBeamChild;
     mpFireChild = &mFireChild;
@@ -198,8 +198,8 @@ s32 daMozo_c::CreateInit() {
     mAnimMorf->calc();
     wait_proc_init();
 
-    if (l_HIO.mChildID < 0) {
-        l_HIO.mChildID = mDoHIO_createChild("モ石像", &l_HIO); // "Mo Statue" (mo sekizou)
+    if (l_HIO.mNo < 0) {
+        l_HIO.mNo = mDoHIO_createChild("モ石像", &l_HIO); // "Mo Statue" (mo sekizou)
     }
 
     return cPhs_COMPLEATE_e;
diff --git a/src/d/actor/d_a_nh.cpp b/src/d/actor/d_a_nh.cpp
index e54462862..ff126cac6 100644
--- a/src/d/actor/d_a_nh.cpp
+++ b/src/d/actor/d_a_nh.cpp
@@ -50,7 +50,7 @@ static dCcD_SrcCyl l_cyl_src = {
 
 /* 800F95B8-800F9654       .text __ct__10daNh_HIO_cFv */
 daNh_HIO_c::daNh_HIO_c() {
-    mChildID = -1;
+    mNo = -1;
     static const hio_prm_c init_data = {
         /* field_0x08         */ 200.0f,
         /* field_0x0c         */ 100.0f,
@@ -74,9 +74,9 @@ daNh_HIO_c::daNh_HIO_c() {
 
 /* 800F9654-800F9874       .text __dt__6daNh_cFv */
 daNh_c::~daNh_c() {
-    if (l_HIO.mChildID >= 0) {
-        mDoHIO_deleteChild(l_HIO.mChildID);
-        l_HIO.mChildID = -1;
+    if (l_HIO.mNo >= 0) {
+        mDoHIO_deleteChild(l_HIO.mNo);
+        l_HIO.mNo = -1;
     }
 }
 
@@ -134,8 +134,8 @@ s32 daNh_c::create() {
     
     fopAcM_SetMtx(this, mpModel->getBaseTRMtx());
     
-    if (l_HIO.mChildID < 0) {
-        l_HIO.mChildID = mDoHIO_createChild("森のほたる", &l_HIO); // "Forest Firefly" (mori no hotaru)
+    if (l_HIO.mNo < 0) {
+        l_HIO.mNo = mDoHIO_createChild("森のほたる", &l_HIO); // "Forest Firefly" (mori no hotaru)
         l_HIO.mpActor = this;
     }
     if (!init()) {
diff --git a/src/d/actor/d_a_npc_bs1.cpp b/src/d/actor/d_a_npc_bs1.cpp
index 11a1b1319..cbffef222 100644
--- a/src/d/actor/d_a_npc_bs1.cpp
+++ b/src/d/actor/d_a_npc_bs1.cpp
@@ -106,7 +106,7 @@ daNpc_Bs1_HIO_c::daNpc_Bs1_HIO_c() {
     mChild[1].m3C = 27.0f;
     mChild[1].m40 = 20.0f;
     
-    mChildId = -1;
+    mNo = -1;
     m8 = -1;
 }
 
@@ -2102,7 +2102,7 @@ BOOL daNpc_Bs1_c::_delete() {
         mpMorf->stopZelAnime();
     }
     if (l_HIO.m8 >= 0 && (l_HIO.m8 -= 1) < 0) {
-        mDoHIO_deleteChild(l_HIO.mChildId);
+        mDoHIO_deleteChild(l_HIO.mNo);
     }
     return TRUE;
 }
@@ -2139,7 +2139,7 @@ s32 daNpc_Bs1_c::_create() {
         } else {
             fopAcM_SetMtx(this, mpMorf->getModel()->getBaseTRMtx());
             if (l_HIO.m8 < 0) {
-                l_HIO.mChildId = mDoHIO_createChild("ボ−トショップ店員", &l_HIO); // "Boat Shopkeeper"
+                l_HIO.mNo = mDoHIO_createChild("ボ−トショップ店員", &l_HIO); // "Boat Shopkeeper"
             }
             l_HIO.m8 += 1;
             if (!CreateInit()) {
diff --git a/src/d/actor/d_a_npc_btsw2.cpp b/src/d/actor/d_a_npc_btsw2.cpp
index afa8d2a5e..ab2f8759d 100644
--- a/src/d/actor/d_a_npc_btsw2.cpp
+++ b/src/d/actor/d_a_npc_btsw2.cpp
@@ -71,7 +71,7 @@ daNpc_Btsw2_HIO_c::daNpc_Btsw2_HIO_c() {
     m38 = 0.95f;
     m3C = 0x5A;
     m3E = 0x5A;
-    mChildID = -1;
+    mNo = -1;
 }
 
 const char daNpc_Btsw2_c::m_arc_name[] = "Btsw";
diff --git a/src/d/actor/d_a_npc_kamome.cpp b/src/d/actor/d_a_npc_kamome.cpp
index b729e069e..d4d7fc1ba 100644
--- a/src/d/actor/d_a_npc_kamome.cpp
+++ b/src/d/actor/d_a_npc_kamome.cpp
@@ -54,7 +54,7 @@ daNpc_kam_HIO1_c::daNpc_kam_HIO1_c() {
 
 /* 00000174-000001F8       .text __ct__15daNpc_kam_HIO_cFv */
 daNpc_kam_HIO_c::daNpc_kam_HIO_c() {
-    mChildID = -1;
+    mNo = -1;
     static const hio_prm_c init_data = {
         /* m08 */ 3000.0f,
         /* m0C */ 1000.0f,
@@ -162,9 +162,9 @@ daNpc_kam_c::~daNpc_kam_c() {
         mpMorf->stopZelAnime();
     }
     
-    if (l_HIO.mChildID >= 0) {
-        mDoHIO_deleteChild(l_HIO.mChildID);
-        l_HIO.mChildID = -1;
+    if (l_HIO.mNo >= 0) {
+        mDoHIO_deleteChild(l_HIO.mNo);
+        l_HIO.mNo = -1;
     }
     
     offHyoiKamome();
@@ -267,8 +267,8 @@ s32 daNpc_kam_c::create() {
         
         fopAcM_SetMtx(this, mpMorf->getModel()->getBaseTRMtx());
         
-        if (l_HIO.mChildID < 0) {
-            l_HIO.mChildID = mDoHIO_createChild("かもめ", &l_HIO); // "Seagull" (kamome)
+        if (l_HIO.mNo < 0) {
+            l_HIO.mNo = mDoHIO_createChild("かもめ", &l_HIO); // "Seagull" (kamome)
             l_HIO.mpActor = this;
         }
         
diff --git a/src/d/actor/d_a_npc_md.cpp b/src/d/actor/d_a_npc_md.cpp
index 1ef573237..4202f3092 100644
--- a/src/d/actor/d_a_npc_md.cpp
+++ b/src/d/actor/d_a_npc_md.cpp
@@ -314,7 +314,7 @@ daNpc_Md_HIO_c::daNpc_Md_HIO_c() {
     m1A8 = 3.0f;
     m1AC = 1000.0f;
     m1B0 = 1000.0f;
-    mChildID = -0x1;
+    mNo = -1;
 }
 
 /* 000006DC-000006FC       .text daNpc_Md_XyCheckCB__FPvi */
@@ -455,8 +455,8 @@ s32 daNpc_Md_c::create() {
         
         fopAcM_SetMtx(this, mpMorf->getModel()->getBaseTRMtx());
         
-        if (l_HIO.mChildID < 0) {
-            l_HIO.mChildID = mDoHIO_createChild("リト族（メドリ）", &l_HIO); // "Rito (Medli)" (Ritozoku (Medli))
+        if (l_HIO.mNo < 0) {
+            l_HIO.mNo = mDoHIO_createChild("リト族（メドリ）", &l_HIO); // "Rito (Medli)" (Ritozoku (Medli))
             l_HIO.mpActor = this;
         }
         
@@ -3304,9 +3304,9 @@ daNpc_Md_c::~daNpc_Md_c() {
     m3058.end();
     m304C.end();
     m3074.remove();
-    if (l_HIO.mChildID >= 0) {
-        mDoHIO_deleteChild(l_HIO.mChildID);
-        l_HIO.mChildID = -1;
+    if (l_HIO.mNo >= 0) {
+        mDoHIO_deleteChild(l_HIO.mNo);
+        l_HIO.mNo = -1;
     }
     m_flying = false;
     m_mirror = false;
diff --git a/src/d/actor/d_a_obj_Ygush00.cpp b/src/d/actor/d_a_obj_Ygush00.cpp
index b06d84b4a..bb3fbfdfc 100644
--- a/src/d/actor/d_a_obj_Ygush00.cpp
+++ b/src/d/actor/d_a_obj_Ygush00.cpp
@@ -91,8 +91,8 @@ s32 daObjYgush00_c::_create() {
                 scale.x * 80.0f, scale.y * 125.0f, scale.z * 80.0f);
 
 #ifdef DEBUG
-                if (l_HIO.mChildID < 0) {
-                    l_HIO.mChildID = mDoHIO_createChild("", &l_HIO);
+                if (l_HIO.mNo < 0) {
+                    l_HIO.mNo = mDoHIO_createChild("", &l_HIO);
                 }
 #endif
         } else {
@@ -108,9 +108,9 @@ bool daObjYgush00_c::_delete() {
     dComIfG_resDelete(&mPhase, l_arcname);
 
 #ifdef DEBUG
-    if (l_HIO.mChildID >= 0) {
-        mDoHIO_deleteChild(l_HIO.mChildID);
-        l_HIO.mChildID = -1;
+    if (l_HIO.mNo >= 0) {
+        mDoHIO_deleteChild(l_HIO.mNo);
+        l_HIO.mNo = -1;
     }
 #endif
 
diff --git a/src/d/actor/d_a_obj_quake.cpp b/src/d/actor/d_a_obj_quake.cpp
index 75e7e57d9..5ad7816c7 100644
--- a/src/d/actor/d_a_obj_quake.cpp
+++ b/src/d/actor/d_a_obj_quake.cpp
@@ -12,7 +12,7 @@ static daObjQuake_HIO_c l_HIO;
 
 /* 000000EC-00000134       .text __ct__16daObjQuake_HIO_cFv */
 daObjQuake_HIO_c::daObjQuake_HIO_c() {
-    mChildID = -1;
+    mNo = -1;
     field_0x08 = 0;
     field_0x0C = 0;
     field_0x0D = 0;
@@ -50,8 +50,8 @@ s32 daObjQuake_c::_create() {
             break;
         }
 
-        if (l_HIO.mChildID < 0) {
-            l_HIO.mChildID = mDoHIO_createChild("振動効果", &l_HIO); // "Vibration Effect"
+        if (l_HIO.mNo < 0) {
+            l_HIO.mNo = mDoHIO_createChild("振動効果", &l_HIO); // "Vibration Effect"
         }
 
         l_HIO.field_0x08 += 1;
@@ -79,11 +79,11 @@ BOOL daObjQuake_c::_is_delete() {
         }
     }
 
-    if (l_HIO.mChildID >= 0) {
+    if (l_HIO.mNo >= 0) {
         l_HIO.field_0x08 -= 1;
         if (l_HIO.field_0x08 == 0) {
-            mDoHIO_deleteChild(l_HIO.mChildID);
-            l_HIO.mChildID = -1;
+            mDoHIO_deleteChild(l_HIO.mNo);
+            l_HIO.mNo = -1;
         }
     }
 
diff --git a/src/d/actor/d_a_sail.cpp b/src/d/actor/d_a_sail.cpp
index 640eb51ce..97e7ddf1b 100644
--- a/src/d/actor/d_a_sail.cpp
+++ b/src/d/actor/d_a_sail.cpp
@@ -738,9 +738,9 @@ static BOOL daSail_Delete(sail_class* i_this) {
     dComIfG_resDelete(&i_this->mClothPhase, "Cloth");
     dComIfG_resDelete(&i_this->mKaizokusenPhase, "Kaizokusen");
     
-    if (l_HIO.mChildID >= 0) {
-        mDoHIO_root.m_subroot.deleteChild(l_HIO.mChildID);
-        l_HIO.mChildID = -1;
+    if (l_HIO.mNo >= 0) {
+        mDoHIO_root.m_subroot.deleteChild(l_HIO.mNo);
+        l_HIO.mNo = -1;
     }
     
     return TRUE;
@@ -779,8 +779,8 @@ static s32 daSail_Create(fopAc_ac_c* i_actor) {
     
     int phase_state = cPhs_COMPLEATE_e;
     if (fopAcM_entrySolidHeap(i_this, daSail_checkCreateHeap, 0x4C0)) {
-        if (l_HIO.mChildID < 0) {
-            l_HIO.mChildID = mDoHIO_root.m_subroot.createChild("海賊船の帆", &l_HIO); // "Pirate Ship's Sail"
+        if (l_HIO.mNo < 0) {
+            l_HIO.mNo = mDoHIO_root.m_subroot.createChild("海賊船の帆", &l_HIO); // "Pirate Ship's Sail"
         }
         
         i_this->mSailPacket.m1C44 = 0.0f;
diff --git a/src/d/d_jnt_hit.cpp b/src/d/d_jnt_hit.cpp
index b8ee337a9..75ee7c9f6 100644
--- a/src/d/d_jnt_hit.cpp
+++ b/src/d/d_jnt_hit.cpp
@@ -17,7 +17,7 @@ JntHit_HIO_c::JntHit_HIO_c() {
     m1C = 0.0f;
     m20 = 0.0f;
     m24 = 100.0f;
-    mChildID = -1;
+    mNo = -1;
 }
 
 /* 80060C44-80060EC4       .text CreateInit__8JntHit_cFv */
diff --git a/src/d/d_menu_option.cpp b/src/d/d_menu_option.cpp
index f42a12f31..94e6ad176 100644
--- a/src/d/d_menu_option.cpp
+++ b/src/d/d_menu_option.cpp
@@ -242,7 +242,7 @@ void dMenu_Option_c::_create() {
     mE3A = 0xFF;
     mE3B = 0xC0;
     
-    g_moHIO.mChildID = mDoHIO_createChild("オプション画面", &g_moHIO); // "Option Screen"
+    g_moHIO.mNo = mDoHIO_createChild("オプション画面", &g_moHIO); // "Option Screen"
 }
 
 /* 801D53F0-801D546C       .text _delete__14dMenu_Option_cFv */
diff --git a/src/d/d_s_play.cpp b/src/d/d_s_play.cpp
index ba78ae555..9844f58ec 100644
--- a/src/d/d_s_play.cpp
+++ b/src/d/d_s_play.cpp
@@ -1111,9 +1111,9 @@ static BOOL dScnPly_Delete(dScnPly_ply_c* i_this) {
     
     g_msgDHIO.field_0x06 = 0;
     g_msgDHIO.field_0x10 = -1;
-    mDoHIO_deleteChild(g_darkHIO.mChildID);
-    mDoHIO_deleteChild(g_envHIO.mChildID);
-    mDoHIO_deleteChild(g_msgDHIO.mChildID);
+    mDoHIO_deleteChild(g_darkHIO.mNo);
+    mDoHIO_deleteChild(g_envHIO.mNo);
+    mDoHIO_deleteChild(g_msgDHIO.mNo);
     
     dComIfGp_setWindowNum(0);
     
@@ -1339,9 +1339,9 @@ s32 phase_4(dScnPly_ply_c* i_this) {
     dStage_Create();
     mDoGph_gInf_c::setTickRate((OS_BUS_CLOCK / 4) / 30);
 
-    g_darkHIO.mChildID = mDoHIO_createChild("暗闇スポット", &g_darkHIO); // "Darkness Spot"
-    g_envHIO.mChildID = mDoHIO_createChild("描画設定", &g_envHIO); // "Draw Settings"
-    g_msgDHIO.mChildID = mDoHIO_createChild("Message Data", &g_msgDHIO);
+    g_darkHIO.mNo = mDoHIO_createChild("暗闇スポット", &g_darkHIO); // "Darkness Spot"
+    g_envHIO.mNo = mDoHIO_createChild("描画設定", &g_envHIO); // "Draw Settings"
+    g_msgDHIO.mNo = mDoHIO_createChild("Message Data", &g_msgDHIO);
 
     new(&dComIfGp_getAttention()) dAttention_c(dComIfGp_getPlayer(0), NULL);
     dComIfGp_getVibration().Init();
diff --git a/src/f_ap/f_ap_game.cpp b/src/f_ap/f_ap_game.cpp
index ed73810e7..f14074ff8 100644
--- a/src/f_ap/f_ap_game.cpp
+++ b/src/f_ap/f_ap_game.cpp
@@ -98,7 +98,7 @@ void fapGm_Create() {
     fopDwTg_CreateQueue();
     fopScnM_CreateReq(PROC_LOGO_SCENE, PROC_INVALID_e, 0, 0);
 
-    g_HIO.mChildID = mDoHIO_createChild("ゲームシステム", &g_HIO); // "Game System"
+    g_HIO.mNo = mDoHIO_createChild("ゲームシステム", &g_HIO); // "Game System"
 }
 
 /* 80023288-800232D0       .text __dt__11fapGm_HIO_cFv */