Why of all of the girl in the whole of the .Hack series did it have to be Annoy-a-tron Atoli?
Probably because CC's yellow eyes and green hair went well with Atoli's green and white outfit. Atoli was also the third-most popular character of the .hack//g.u. franchise too. Then again, Creayus could have drawn C.C. in Shino's outfit instead, which is the same as Atoli's but with a different colour scheme.