The older brother of Lenalee, Komui Lee is often shown to be a whimsical and goofy character, but he is also somewhat sadistic and occasionally, borderline maniacal. He drinks coffee nonstop, but he only drinks the Blue Mountain brand. He is lazy and often does his best to avoid work, including running away from the office.
Awesome cosplay by Hyuri ヒューリィ (ひゅーりぃ)! And yes, he is a guy cosplayer cosplaying guy characters! Very rare to find these days. Thanks again to Fumiki for sending this in!