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unity/Assets/Script/GameObject/Other/FacingCamera.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class FacingCamera : MonoBehaviour
+{
+    Transform[] childs;
+    private Transform cameraMain;
+    private void Awake()
+    {
+        cameraMain = GameObject.FindGameObjectWithTag("Camera").transform;
+    }
+    void Start()
+    {
+        childs = new Transform[transform.childCount];
+        for (int i = 0; i < transform.childCount; i++)
+        {
+            childs[i] = transform.GetChild(i);
+        }
+    }
+
+    void Update()
+    {
+        for (int i = 0; i < childs.Length; i++)
+        {
+            childs[i].rotation = cameraMain.rotation;
+        }
+    }
+}
+