What Camera am i using

Okay so im new to this game engine and i was wondering something. if i make a fps character from scratch with blueprint the capsule doesnt have a camera component, stil i can look around and stuff when im playing. What camera am i using then?

Also if i ad a Camera component to my character, do my game use that camera instead of the “non existing” camera i used befour then? or does it stil use the Non-existing camera?

Basicly: How do i know what camera is in use?