So, what happened to Byakuya? He seemed like aperfect example.

So, what happened to Byakuya? He seemed like a perfect example.

So basically, this is about the character's big brother who is pretty much a bit of an asshole, or at least a little cold?

Is there a reason anime/manga-specific terms are used in the trope's description? The trope's not exclusive to Japanese media, so I'm not sure why the shonen/bishonen thing applies to the trope as a whole.