English Voice/Seiyuu: Megumi Hayashibara
Pen Pen is an unusual breed of Erect-Crested "hot water spring" penguin with enhanced intelligence, genetically adapted to warm water activity. He lives in Misato's apartment in a specially made cooler unit(that looks like a refrigerator), complete with a light that stays on while the door is closed. Pen Pen was part of an experiment at Misato's last place of employment, but when the experiment was concluded, Misato decided to take him home with her. Pen Pen has a habit of drinking beer with his meals - a predilection that may have been learned from his owner. He rivals Misato not only in his capacity to eat curry and drink beer, but possibly also in intelligence! One always has the feeling that Pen Pen knows more about the Angels and what's going on than any penguin has the right to know!