Example source for post "CoreObject" at http://angryant.com/2017/07/04/CoreObject/

CoreCharacterInstance.cs

using UnityEngine;


public class CoreCharacterInstance : MonoBehaviour
{
	[SerializeField] CoreCharacter m_CoreCharacter;
	[SerializeField] Character m_Character;


	void Reset ()
	{
		m_Character = GetComponent<Character> ();
	}


	void Awake ()
	{
		m_CoreCharacter.Register (m_Character);
	}
}

CoreGameObject.cs

using UnityEngine;


[CreateAssetMenu(fileName = "New core GameObject.asset", menuName = "New core GameObject")]
public class CoreGameObject : CoreObject<GameObject>
{}

CoreGameObjectInstance.cs

using UnityEngine;


public class CoreGameObjectInstance : MonoBehaviour
{
	[SerializeField] CoreGameObject m_CoreGameObject;


	void Awake ()
	{
		m_CoreGameObject.Register (gameObject);
	}
}

CoreObject.cs

using UnityEngine;
using System;


public abstract class CoreObject<T> : ScriptableObject where T : class
{
	WeakReference m_Instance;


	public T Instance
	{
		get
		{
			if (m_Instance == null)
			{
				return null;
			}

			if (m_Instance.Target == null)
			{
				return (T)(m_Instance.Target = null);
			}

			return (T)m_Instance.Target;
		}
	}


	public void Register (T instance)
	{
		if (m_Instance == null)
		{
			m_Instance = new WeakReference (instance);
		}
		else
		{
			m_Instance.Target = instance;
		}
	}
}

Test.cs

using UnityEngine;


public class Test : MonoBehaviour
{
	[SerializeField] CoreGameObject m_TheObject;


	void Start ()
	{
		m_TheObject.Instance.SetActive (false);
	}
}