diff --git a/Assets/Scripts/Gameplay/EnemyDeath.cs b/Assets/Scripts/Gameplay/EnemyDeath.cs
index 89da4da..c5ac0d1 100644
--- a/Assets/Scripts/Gameplay/EnemyDeath.cs
+++ b/Assets/Scripts/Gameplay/EnemyDeath.cs
@@ -19,7 +19,11 @@ namespace Platformer.Gameplay
             // 충돌·이동·patrol 영역 비활성
             if (enemy._collider != null) enemy._collider.enabled = false;
             if (enemy.control != null) enemy.control.enabled = false;
-            enemy.enabled = false;  // BT104: EnemyController patrol 영역 정지
+            enemy.enabled = false;  // EnemyController patrol 영역 정지
+
+            // BT105 — 제자리 사망 (PD 명시 2026-05-08): Rigidbody2D simulated = false → gravity X·물리 미참여
+            var body = enemy.GetComponent<Rigidbody2D>();
+            if (body != null) body.simulated = false;
 
             // death 애니메이션 트리거 (Enemy.controller 영역의 'death' parameter)
             var animator = enemy.GetComponent<Animator>();
diff --git a/Assets/Scripts/Mechanics/EnemyController.cs b/Assets/Scripts/Mechanics/EnemyController.cs
index 1cd215d..8db23e9 100644
--- a/Assets/Scripts/Mechanics/EnemyController.cs
+++ b/Assets/Scripts/Mechanics/EnemyController.cs
@@ -166,16 +166,16 @@ namespace Platformer.Mechanics
             _lastX = transform.position.x;
         }
 
-        // BT103 — 정확 측정 (PD 명시 2026-05-08): Start 시점 1회 측정·간격 0.1m·Capsule 발 영역 정확
+        // BT105 — 정확 측정·안전 margin 2.0m (PD 보고 떨어짐 잔존: 보수적 영역으로 절벽 도달 X 보장)
         float MeasureSafeWalkDistance(float dir)
         {
             if (_collider == null) return patrolMaxRange;
-            float groundY = _collider.bounds.min.y + 0.05f;  // Capsule 발 영역 위 0.05m
+            float groundY = _collider.bounds.min.y + 0.05f;
             for (float d = 0.1f; d <= patrolMaxRange; d += 0.1f)
             {
                 Vector2 origin = new Vector2(_startX + dir * d, groundY);
                 RaycastHit2D hit = Physics2D.Raycast(origin, Vector2.down, cliffCheckDepth, groundLayerMask);
-                if (hit.collider == null) return Mathf.Max(0f, d - 0.5f);  // 안전 margin 0.5m
+                if (hit.collider == null) return Mathf.Max(0f, d - 2.0f);  // BT105: 0.5→2.0m
             }
             return patrolMaxRange;
         }