Arena Information Pilot - Ryuguu Rena AC - Sweet Sweet Friend A sweet and caring girl, but don't be fooled, because she will be the last thing you see before you die. Additional Information Ryuguu Rena lives in Hinamezawa and is a member of the Hinamezawa Fatal Six. While she's not exactly a raven, she willingly participates in the interdimensional arena and has even achieved some success. Her robot's colors are the way they are because she thought it would be cool to paint it the same colors as her everyday dress because it's so cute, and it's also named Sweet Sweet Friend because everything about her has to be cute. In everyday life she is sweet, but in battle she is bloodthirsty to the point of insanity, and if you threaten the village or her friends, you are dead.