I don't even know D. GrayMan (heard of it, of course), but this picture still made me laugh. Their different reactions to the cups and expressions really tell what each character is like! This was a very creative idea. I like how the top right listener looks so angry.
Hohohoho that komui one is just so perfect, I can imagine that you must have giggled to yourself when the thought of him like that crossed your mind, it's exactly like him! I love this so much, I look at it like every day. XD