"Fussy Lunch"

"Fussy Lunch" (うるさいランチ, Urusai Ranchi) is a member of the Angels, and a former friend of Sakura Sakurakouji and Rei Ogami. It is revealed in chapter 183 that his real name is "Ai Ueo".

Power Users
"Fussy Lunch" despises Power Users after December 32, and especially Code:Emperor.

Rei Ogami
Before December 32, Ogami, "Fussy Lunch", and Sakura seemed to be good friends. At one point, he tells Ogami that he wasn't that bad of a person after all. However, once Code:Emperor began killing the Rare Kinds, "Fussy Lunch" killed the Power Users surrounding him, including Ogami.

Trivia

 * He always carries many bentos with him and usually takes them out to eat any time and any place, regardless of the situation.