Question How to create prefab variants with different behaviors without reassignment

I have a base prefab and a parent class for characters.

Code (CSharp):

1. public class CharacterParent : MonoBehaviour
2. {
3.     public Rigidbody2D rigid2D;
4. }

I want to create two prefab variant with different behavior and class.
For example,

Code (CSharp):

1. public class CharacterChild1 : CharacterParent
2. {
3.     void Update() {transform.position.x += 5f;}
4. }

Code (CSharp):

1. public class CharacterChild2 : CharacterParent
2. {
3.     void Update() {rigid2D.rotation += 10f;}
4. }

I currently add a new script for each variant, but it's tedious to reassign variables like rigid2D.
Is there easier way to do this?

 

Get them in Start() or Awake() and make them private.
You can use RequireComponent to force a component on the same object as the script so it's always there

 

What I wanted to do was something like automatically generating child classes, but it seems that Start/Awake method is sufficient. And I didn't know about RequireComponent, so I'll try to use it too.
Thank you very much.