Child and foreach ?

Hello, I have two different problems. I am making a tactil game where each enemy have a symbol. When you execute it you kill the closest. The problem is when I kill one, they all die (all already instanciate). Maybe it's a problem with the foreach. Then, I don't know how to target by symbol (currently the symbol are just child of the prefab.

GameObject GestureAttack() { Invincible();

 GameObject[] Foes = GameObject.FindGameObjectsWithTag("Foe");
 GameObject closest = null;
 float distance = Mathf.Infinity;
 Vector3 position = transform.position;
 Transform Zed = transform.Find("UI_zed");

 foreach (GameObject go in Foes)
 {
     Vector3 diff = go.transform.position - position;
     float curDistance = diff.sqrMagnitude;
     if (curDistance < distance)
     {
         closest = go;
         distance = curDistance;
         closest2 = new Vector3(closest.transform.position.x-1, 1, closest.transform.position.z-1);
     }
 }
 if (recupgeste == "GAcircle" && recupgestescore > 0.80 || Input.GetKeyDown(KeyCode.Space))
 {
    transform.position = Vector3.MoveTowards(transform.position, closest2, 50 /*100*Time.deltaTime*/);
        foreach (GameObject go in Foes)
         {
             
             FoeCurrentHealth = go.GetComponent<s_EnnemyControl>().FoeCurrentHealth;
             s_EnnemyControl enemyHealth = go.GetComponent<s_EnnemyControl>();
                 if (FoeCurrentHealth >0)
             {
                // Debug.Log("TOOK");
                 enemyHealth.TakeDamage(attackDamage);
             }
         }
 }
 return closest;   

}