Take a look at: How do I programmatically assign a GameObject to a prefab?

There is some code provided there (in C#), so hopefully you can gain an understanding from it.

NOTE: THIS IS IN C#

You could always create one script called "SaveData" or something similar and have this in it

using UnityEngine;
using System;

public class SaveData : MonoBehaviour {

    public void SaveCharacterData() {
        GameObject pc = GameObject.Find("pc");

        PlayerCharacter pcClass = pc.GetComponent<PlayerCharacter>();
        PlayerPrefs.SetString("Player Name", pcClass.Name);

        for(int cnt = 0; cnt < Enum.GetValues(typeof(AttributeName)).Length; cnt++) {
            PlayerPrefs.SetInt(((AttributeName)cnt).ToString() + " - Base Value", pcClass.GetPrimaryAttribute(cnt).BaseValue);
            PlayerPrefs.SetInt(((AttributeName)cnt).ToString() + " - Exp To Level", pcClass.GetPrimaryAttribute(cnt).ExpToLevel);
        }

        for(int cnt = 0; cnt < Enum.GetValues(typeof(VitalName)).Length; cnt++) {
            PlayerPrefs.SetInt(((VitalName)cnt).ToString() + " - Base Value", pcClass.GetVital(cnt).BaseValue);
            PlayerPrefs.SetInt(((VitalName)cnt).ToString() + " - Exp To Level", pcClass.GetVital(cnt).ExpToLevel);
            PlayerPrefs.SetInt(((VitalName)cnt).ToString() + " - Current Value", pcClass.GetVital(cnt).CurValue);

//          PlayerPrefs.SetString(((VitalName)cnt).ToString() + " - Mods", pcClass.GetVital(cnt).GetModifyingAttrituesString());

        }

        for(int cnt = 0; cnt < Enum.GetValues(typeof(SkillName)).Length; cnt++) {
            PlayerPrefs.SetInt(((SkillName)cnt).ToString() + " - Base Value", pcClass.GetSkill(cnt).BaseValue);
            PlayerPrefs.SetInt(((SkillName)cnt).ToString() + " - Exp To Level", pcClass.GetSkill(cnt).ExpToLevel);

//          PlayerPrefs.SetString(((SkillName)cnt).ToString() + " - Mods", pcClass.GetSkill(cnt).GetModifyingAttrituesString());

        }
    }

    public void LoadCharacterData() {
        GameObject pc = GameObject.Find("pc");

        PlayerCharacter pcClass = pc.GetComponent<PlayerCharacter>();
        pcClass.Name = PlayerPrefs.GetString("Player Name", "Name Me");

        for(int cnt = 0; cnt < Enum.GetValues(typeof(AttributeName)).Length; cnt++) {
            pcClass.GetPrimaryAttribute(cnt).BaseValue = PlayerPrefs.GetInt(((AttributeName)cnt).ToString() + " - Base Value", 0);
            pcClass.GetPrimaryAttribute(cnt).ExpToLevel = PlayerPrefs.GetInt(((AttributeName)cnt).ToString() + " - Exp to Level", 0);
        }

        for(int cnt = 0; cnt < Enum.GetValues(typeof(VitalName)).Length; cnt++) {
            pcClass.GetVital(cnt).BaseValue = PlayerPrefs.GetInt(((VitalName)cnt).ToString() + " - Base Value", 0);
            pcClass.GetVital(cnt).ExpToLevel = PlayerPrefs.GetInt(((VitalName)cnt).ToString() + " - Exp to Level", 0);

        //make sure you call this so that the AdjustedBaseValue will be updated before you try to call to get the curValue
        pcClass.GetVital(cnt).Update();

        //get the started value for the curValue for each vital
        pcClass.GetVital(cnt).CurValue = PlayerPrefs.GetInt(((VitalName)cnt).ToString() + " - Cur Value", 1);
        }

        for(int cnt = 0; cnt < Enum.GetValues(typeof(SkillName)).Length; cnt++) {
            pcClass.GetSkill(cnt).BaseValue = PlayerPrefs.GetInt(((SkillName)cnt).ToString() + " - Base Value", 0);
            pcClass.GetSkill(cnt).ExpToLevel = PlayerPrefs.GetInt(((SkillName)cnt).ToString() + " - Exp To Level", 0);      
        }

        //output the curValue for each of the vitals
        for(int cnt = 0; cnt < Enum.GetValues(typeof(SkillName)).Length; cnt++) {
            Debug.Log(((SkillName)cnt).ToString() + ": " + pcClass.GetSkill(cnt).BaseValue + " - " + pcClass.GetSkill(cnt).ExpToLevel);
        }
}
}

I apologize for all the stuff in there those are just what determines my skills/vitals... If you want to learn how to set up those check out the tutorial by BurgZergArcade on youtube...

Im not going to give you a link to his videos for two reasons...

• It helps to start from the beginning of his tutorials to set this up...
• You can just go to his channel which is BurgZergArcade.

I apologize if this doesn't help because of all you have to do to get it to work but i tried...

I don't know if you can do that....

You can create a "base" prefab and append on any extra components needed.

Unity is not good at doing things that it wasn't designed to do...