Kobato's companion, who usually appears as a stuffed toy dog. It's actually rather foul-mouthed and bad-tempered and the first to scathingly criticize or hit Kobato for her naïveté and stupidity and often calls her "Dobato" (lit. Stupid Dove), though he will acknowledge Kobato's efforts when he feels she deserves it.

His origin is still unknown, but he can produce a blast of power when offended like when he blasted the perverted old man in the first chapter of Kobato, though he often uses it on Kobato whenever she messes up. Ioryogi was originally Tsubaki Nekoi's mascot on Clamp's self caricatures.