Parenting a GameObject with script not working (C#)

So, I'm trying to make a system where I can swap between playable characters by pressing a button, and parenting them to a GameObject with the Player Controller. However, the character object will not become a child of the player object when I create it. What's wrong with this?

     public GameObject hero1;
     public GameObject hero2;
     private GameObject currentHero;
     public Transform heroOrigin;
     public Transform Player;
 
     // Use this for initialization
     void Start () {
         currentHero = hero1;
         Instantiate(currentHero, heroOrigin.position, heroOrigin.rotation);
           }
     
     // Update is called once per frame
     void Update () {
         if (Input.GetAxisRaw("DPad") < -0.5 && currentHero != hero1)
         {
             currentHero = hero1;
             Instantiate(currentHero, heroOrigin.position, heroOrigin.rotation);
             currentHero.transform.SetParent(Player);
         }
         if (Input.GetAxisRaw("DPad") > 0.5 && currentHero != hero2)
         {
             currentHero = hero2;
             Instantiate(currentHero, heroOrigin.position, heroOrigin.rotation);
             currentHero.transform.SetParent(Player);
         }
     }