Gotcha! The character I was thinking of specifically was Mikleo from Tales of Zestiria -- since he's a magical spirit seraph thing he's normally invisible to people and has a bunch of other passive things going on (no need to eat or sleep, can sense evil energy, etc etc). I wanted to clarify since it feels like it falls into a gray area between physical state and powers, and I was actually hoping it would be possible to play with those things not being active in low-frequency areas!