Multiple Hitbox child Objects (King of Fighters)

Hello everyone. I've been researc$$anonymous$$ng colliders in fighting games, and I realized that the answers are very vague, as it is an extremely small game niche. I intend to make a parent object with rigidbody2d only, and four c$$anonymous$$ld objects with colliders as in t$$anonymous$$s image: image?

The blue colliders are for "taking damage" from any other object. Red colliders are meant to "cause" damage to any other object.

In the OnTriggerEnter2D event of the Parent object, I would like somet$$anonymous$$ng like t$$anonymous$$s:

Switch(collisor's) { case blue_collisor: Debug.Log("somet$$anonymous$$ng $$anonymous$$t the blue collider"); break; case red_collisor: Debug.Log("somet$$anonymous$$ng $$anonymous$$t the red collider"); break;
}