What is the best way to set up multiple characters for interactions?

What I mean is, I have been used to using the third person character for everything up till now. Just now wrapping my mind around the possibility of other character bps. But in one of the enemy bps, where I would always use the third person character (refs, get capsule, etc etc). How do I simplify this so that one of three player characters can assume all those interactions? Anyone know? Thanks

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Can you share a bp as example? ‘This’ can be a lot of things.

I don’t have one to show you unfortunately. But to give you an idea, say in one of your NPC blueprints…you have a box collision at the head / torso. Now lets say you have several characters the player can choose from. In such a case. What would you recommend for NPC001 or whatever in that box collision to check for ALL players. The most efficient way.