KYOU
Kyou is the obligatory cute mascot in Himiko-den, and arguably one of the more cute. His vocabulary in the anime consists almost entirely of "kyou" in it's various forms, though he also appears to be fond of using "BAH!" He can be tooth-achingly cute at times. Whenever Kyou gets major amounts of screen time, you can be sure he's going to do *something* cute.
However, in the video game, things are quite different. Oh, Kyou is there, for sure. But he actually talks, in full sentences! He turns out to be one of the major characters in the early game (but since I haven't gone past the "early game," I can't comment about later on).
In the anime, Kyou is the last survivor of his kind, thanks to landing on the pendant in episode 1. He's becomes Himiko's guardian or companion, since she is the holder of the pendant and is the key to all of the events that occur in 3rd century Yamataikoku. Not to worry though... without giving away too much, suffice it to say that he isn't the last of his kind for the whole time. ^_^