RequireComponentは自作スクリプトでも有効

RequireCharacterComponent.cs

[RequireComponent(typeof(RequiredCharacterStatus))]
public class RequireCharacterComponent : MonoBehaviour {

	RequiredCharacterStatus status;
	void Start(){
		status = gameObject.GetComponent<RequiredCharacterStatus>();
	}
	
	void Update(){
		Debug.Log("キャラクターのHP : " + status.hp);
	}
}