I want to make a cosplay based on subeta items, because they have such cool stuff and I could post pictures of me next to pictures of my avatar...but would subeta be upset over that? is it like, copyright violation or something?

Many Items are like normal wears irl too or are tribute items to a movie or TV show so I don't see that much of a problem in it ^^ For example the and (and the other colours) are both really close to the HP shool uniforms But you might just file a ticket to ask for safety ^^

yeah, some that I was thinking of are pretty distinctive, so I think I'll be on the safe side and ask. thanks!