diff --git a/include/d/actor/d_a_e_s1.h b/include/d/actor/d_a_e_s1.h
index a631ba47ac..5cbae84696 100644
--- a/include/d/actor/d_a_e_s1.h
+++ b/include/d/actor/d_a_e_s1.h
@@ -81,6 +81,15 @@ public:
     /* 0x306D */ u8 field_0x306D[0x307C - 0x306D];
     /* 0x307C */ u32 mBodyEffEmtrID;
     /* 0x3080 */ u8 mInitHIO;
+
+#if TARGET_PC
+    static const int HAIR_STRAND_COUNT = 22;
+    static const int HAIR_SEGMENT_COUNT = 16;
+    cXyz mHairInterpPrev[HAIR_STRAND_COUNT * HAIR_SEGMENT_COUNT];
+    cXyz mHairInterpCurr[HAIR_STRAND_COUNT * HAIR_SEGMENT_COUNT];
+    bool mHairInterpPrevValid;
+    bool mHairInterpCurrValid;
+#endif
 };
 
 STATIC_ASSERT(sizeof(e_s1_class) == 0x3084);
diff --git a/include/d/actor/d_a_e_yg.h b/include/d/actor/d_a_e_yg.h
index 69a85430a8..6be19933cb 100644
--- a/include/d/actor/d_a_e_yg.h
+++ b/include/d/actor/d_a_e_yg.h
@@ -63,6 +63,15 @@ public:
     /* 0x0BB4 */ yg_ke_s mYgKes[13];
     /* 0x1880 */ mDoExt_3DlineMat0_c mLineMat;
     /* 0x189C */ u8 mIsFirstSpawn;
+
+#if TARGET_PC
+    static const int TENTACLE_STRAND_COUNT = 13;
+    static const int TENTACLE_SEGMENT_COUNT = 10;
+    cXyz mTentacleInterpPrev[TENTACLE_STRAND_COUNT * TENTACLE_SEGMENT_COUNT];
+    cXyz mTentacleInterpCurr[TENTACLE_STRAND_COUNT * TENTACLE_SEGMENT_COUNT];
+    bool mTentacleInterpPrevValid;
+    bool mTentacleInterpCurrValid;
+#endif
 };
 
 STATIC_ASSERT(sizeof(e_yg_class) == 0x18a0);
diff --git a/src/d/actor/d_a_e_s1.cpp b/src/d/actor/d_a_e_s1.cpp
index 48cd7d6800..a5a05fce20 100644
--- a/src/d/actor/d_a_e_s1.cpp
+++ b/src/d/actor/d_a_e_s1.cpp
@@ -14,6 +14,8 @@
 #include "d/d_s_play.h"
 #include "f_op/f_op_actor_enemy.h"
 #include "f_op/f_op_camera_mng.h"
+#include "dusk/frame_interpolation.h"
+#include "dusk/settings.h"
 #include <cstring>
 
 class daE_S1_HIO_c {
@@ -99,6 +101,25 @@ static void anm_init(e_s1_class* i_this, int i_resNo, f32 i_morf, u8 i_attr, f32
     i_this->mAnm = i_resNo;
 }
 
+#if TARGET_PC
+static void daE_S1_interp_callback(bool isSimFrame, void* pUserWork) {
+    e_s1_class* i_this = (e_s1_class*)pUserWork;
+    if (!i_this->mHairInterpPrevValid || !i_this->mHairInterpCurrValid) {
+        return;
+    }
+    const f32 alpha = dusk::frame_interp::get_interpolation_step();
+    for (int s = 0; s < e_s1_class::HAIR_STRAND_COUNT; s++) {
+        cXyz* dst = i_this->mLineMat.getPos(s);
+        for (int i = 0; i < e_s1_class::HAIR_SEGMENT_COUNT; i++) {
+            int idx = s * e_s1_class::HAIR_SEGMENT_COUNT + i;
+            const cXyz& p0 = i_this->mHairInterpPrev[idx];
+            const cXyz& p1 = i_this->mHairInterpCurr[idx];
+            dst[i] = p0 + (p1 - p0) * alpha;
+        }
+    }
+}
+#endif
+
 static int daE_S1_Draw(e_s1_class* i_this) {
     if (i_this->field_0x306c != 0) {
         return 1;
@@ -132,6 +153,22 @@ static int daE_S1_Draw(e_s1_class* i_this) {
     i_this->mLineMat.update(16, line_color, &i_this->tevStr);
     dComIfGd_set3DlineMatDark(&i_this->mLineMat);
 
+#if TARGET_PC
+    if (dusk::getSettings().game.enableFrameInterpolation) {
+        if (i_this->mHairInterpCurrValid) {
+            memcpy(i_this->mHairInterpPrev, i_this->mHairInterpCurr, sizeof(i_this->mHairInterpCurr));
+            i_this->mHairInterpPrevValid = true;
+        }
+        for (int s = 0; s < e_s1_class::HAIR_STRAND_COUNT; s++) {
+            cXyz* src = i_this->mLineMat.getPos(s);
+            memcpy(&i_this->mHairInterpCurr[s * e_s1_class::HAIR_SEGMENT_COUNT], src,
+                   e_s1_class::HAIR_SEGMENT_COUNT * sizeof(cXyz));
+        }
+        i_this->mHairInterpCurrValid = true;
+        dusk::frame_interp::add_interpolation_callback(&daE_S1_interp_callback, i_this);
+    }
+#endif
+
     dComIfGd_setList();
     return 1;
 }
@@ -2149,6 +2186,11 @@ static int daE_S1_Create(fopAc_ac_c* i_this) {
             return cPhs_ERROR_e;
         }
 
+#if TARGET_PC
+        a_this->mHairInterpPrevValid = false;
+        a_this->mHairInterpCurrValid = false;
+#endif
+
         OS_REPORT("//////////////E_S1 SET 2 !!\n");
 
         if (path_no != 0xFF) {
diff --git a/src/d/actor/d_a_e_yg.cpp b/src/d/actor/d_a_e_yg.cpp
index 9ab6c80e6d..44a8aee249 100644
--- a/src/d/actor/d_a_e_yg.cpp
+++ b/src/d/actor/d_a_e_yg.cpp
@@ -10,6 +10,8 @@
 #include "f_op/f_op_kankyo_mng.h"
 #include "d/actor/d_a_obj_carry.h"
 #include "Z2AudioLib/Z2Instances.h"
+#include "dusk/frame_interpolation.h"
+#include "dusk/settings.h"
 #include "f_op/f_op_actor_enemy.h"
 
 enum E_yg_RES_File_ID {
@@ -134,7 +136,26 @@ static BOOL pl_check(e_yg_class* i_this, f32 i_dist) {
     return FALSE;
 }
 
-static int daE_YG_Draw(e_yg_class* i_this) {    
+#if TARGET_PC
+static void daE_YG_interp_callback(bool isSimFrame, void* pUserWork) {
+    e_yg_class* i_this = (e_yg_class*)pUserWork;
+    if (!i_this->mTentacleInterpPrevValid || !i_this->mTentacleInterpCurrValid) {
+        return;
+    }
+    const f32 alpha = dusk::frame_interp::get_interpolation_step();
+    for (int s = 0; s < e_yg_class::TENTACLE_STRAND_COUNT; s++) {
+        cXyz* dst = i_this->mLineMat.getPos(s);
+        for (int i = 0; i < e_yg_class::TENTACLE_SEGMENT_COUNT; i++) {
+            int idx = s * e_yg_class::TENTACLE_SEGMENT_COUNT + i;
+            const cXyz& p0 = i_this->mTentacleInterpPrev[idx];
+            const cXyz& p1 = i_this->mTentacleInterpCurr[idx];
+            dst[i] = p0 + (p1 - p0) * alpha;
+        }
+    }
+}
+#endif
+
+static int daE_YG_Draw(e_yg_class* i_this) {
     if (i_this->mDispFlag) {
         return 1;
     }
@@ -160,6 +181,23 @@ static int daE_YG_Draw(e_yg_class* i_this) {
     color.a = 0xFF;
     i_this->mLineMat.update(10, color, &actor->tevStr);
     dComIfGd_set3DlineMatDark(&i_this->mLineMat);
+
+#if TARGET_PC
+    if (dusk::getSettings().game.enableFrameInterpolation) {
+        if (i_this->mTentacleInterpCurrValid) {
+            memcpy(i_this->mTentacleInterpPrev, i_this->mTentacleInterpCurr, sizeof(i_this->mTentacleInterpCurr));
+            i_this->mTentacleInterpPrevValid = true;
+        }
+        for (int s = 0; s < e_yg_class::TENTACLE_STRAND_COUNT; s++) {
+            cXyz* src = i_this->mLineMat.getPos(s);
+            memcpy(&i_this->mTentacleInterpCurr[s * e_yg_class::TENTACLE_SEGMENT_COUNT], src,
+                   e_yg_class::TENTACLE_SEGMENT_COUNT * sizeof(cXyz));
+        }
+        i_this->mTentacleInterpCurrValid = true;
+        dusk::frame_interp::add_interpolation_callback(&daE_YG_interp_callback, i_this);
+    }
+#endif
+
     dComIfGd_setList();
 
     return 1;
@@ -1378,6 +1416,11 @@ static cPhs_Step daE_YG_Create(fopAc_ac_c* actor) {
             return cPhs_ERROR_e;
         }
 
+#if TARGET_PC
+        i_this->mTentacleInterpPrevValid = false;
+        i_this->mTentacleInterpCurrValid = false;
+#endif
+
         if (!hio_set) {
             i_this->mIsFirstSpawn = 1;
             hio_set = true;