Getting a value outside of Coroutine

Hello, I'm actually developping a game on Unity, and I'm stuck on a problem for few days now. I think I'm doing something totally wrong but after searching again and again I found no way. I want to load my characters which are in a MySQL database. I'm using Coroutines to get the values from my PHP scripts, but it looks like I'm getting the coroutine AFTER my game loads characters, but i'm calling the coroutine before it. I'm getting the values, but I can't get them outside of my coroutine in my LoadCharacter. If i'm outputing the values IN my coroutine, I will see the value (CharacterName) that I want, but if I output the CharacterName in my LoadCharacter, it wont.

I'm sorry if I didn't explain well, but I hope that someone will help me just a little bit ! Thank you.

     public CharacterSaveData[] LoadAllCharacters()
     {
         StartCoroutine(GetCharacters());
         string[] charactersList = ZombieHunters.gameManager.CharactersList.Split ("," [0]);
         List<CharacterSaveData> chars = new List<CharacterSaveData> ();
 
         if (charactersList.Length > 0)
         {
             for (int i = 0; i < charactersList.Length; i++)
             {
                 if (charactersList[i] != "")
                 {
                     CharacterSaveData ch = LoadCharacter(charactersList[i]);
                     if (ch.PlayerName != "")
                     {
                         chars.Add(ch);
                     }                    
                 }
             }
 
             CharacterSaveData[] allCharacters = chars.ToArray ();
 
             return allCharacters;
         }
         return null;
     }
 
     public CharacterSaveData LoadCharacter(string charID)
     {
         CharacterSaveData character = new CharacterSaveData ();
         StartCoroutine(LoadChar(charID));
 
         character.PlayerName = ZombieHunters.gameManager.CharacterName;
         character.CharacterIndex = ZombieHunters.gameManager.CharacterIndex;
         Debug.Log("Character Name : " + ZombieHunters.gameManager.CharacterName + ". Character Index : " + ZombieHunters.gameManager.CharacterIndex);
         character.CharacterKey = charID;
         return character;
     }
 
     IEnumerator GetCharacters()
     {
         string uri = "http://localhost/keep-alive/api/getchars.php"; //
         string accountID = ZombieHunters.gameManager.AccountID;
 
         WWWForm form = new WWWForm();
         form.AddField("accountID", accountID);
 
         WWW www = new WWW (uri,form);
 
         yield return www;
         ZombieHunters.gameManager.CharactersList = www.text;
     }
 
     IEnumerator LoadChar(string _characterID)
     {
         string uri = "http://localhost/keep-alive/api/loadchar.php"; 
         int characterID = Int32.Parse(_characterID);
         
         WWWForm form = new WWWForm();
         form.AddField("characterID", characterID);
 
         WWW www = new WWW (uri,form);
 
         yield return www;
         string[] values = www.text.Split(new char[] {'\n'});
 
         ZombieHunters.gameManager.CharacterName = values[0];
         ZombieHunters.gameManager.CharacterIndex = Int32.Parse(values[1]);
         Debug.Log("Load Char Character Name : " + ZombieHunters.gameManager.CharacterName + ". Character Index : " + ZombieHunters.gameManager.CharacterIndex); 
     }