Yeah, that's the characteristics of artists, they are very creative so no matter what they do, they always add their own touch on everything. So in Suho's case, he doesn't just use the shadows as individuals like his dad, he merges them. Noice (=・ω・=)
I don't think it's a really good idea to have lovers in the same workplace though. The line between personal and professional will get blurred at some point. But well, it's a fiction so... Good for them(〜 ̄△ ̄)〜
Maybe it's not that it cannot be killed, it's a cat so it might have 9 lives ╮( ̄▽ ̄)╭