Yokata.jp is a free web­ser­vice for Japan­ese mobile phones.
It allows its users to pro­vide a sim­ple feed­back about any live per­for­mance (music, the­ater, etc.), in real-time, with the use of QR-codes.

They needed a bunch of char­ac­ters to rep­re­sent the diver­sity of their users, that they could use in their com­mu­ni­ca­tion, mostly print and video.