Display Enemy Different on Client


I would like to know what’s the best approach to display a enemy different on the client.
Lets say i want to for every client to see his enemies with a red glow.

I only got one idea how to do that:
For every enemy, wait until it has spawned & replicated on the client, and then change his material to a red glow (ofc only local).
I’m not sure where to do that, but i think the PlayerController might be a good place?

Can anyone tell me if there is any better approach for that?