Maybe he's like a dog.
Always did wonder about those pants. No innuendos/pun intended.
Brera may not trust Alto protecting Ranka, and vice versa. Though it may be more one sided.
I also think it's very likely that Brera is Ranka's brother, but the picture Alto found in Global (If I remember correctly) had only Ranka and presumably her parents. But the man had yellow hair. It's very intriguing. I think there might an episode dedicated or mostly dedicated to this. (Next episode?)