Di Gi Charat Volume 4 - Di Gi Charat Author:Koge-Donbo Digiko and the Di Gi Rangers are getting along with Piyoko and her Dark Gema Gema Gang, but they still can't figure out how to get along with themselves. Now Usada (aka Rabi En Rose) has a plan. She's discovered the key to happiness. But happiness, as she's about to learn, is often a two-sided coin.