Kira, the older brother is the main antagonist of book 2. He actually died at birth, and is a ghost that inhabits Shas's body from time to time, and although most demons can tell that something is wrong when he inhabits Shas's body, only Jane saw through his true nature. He knows he has the chance of a snowball in hell of actually winning Laharl, so he takes Shas hostage by constantly doing a body switch to avoid getting OHKO'd. And since Laharl has to protect Jane at the same time, Kira forced him into the most disadvantageous situation possible.

He got killed off by Flonne by the "Cast Revive on a Zombie" trick. Was pretty awesome. Now he's a Prinny forced to serve in Celestia for 100000 years, under the crime of 'attempting to assassinate the overlord'.

Shas really likes to lay dangerous traps for Laharl. All of them fatal, but she considers it 'play', however, she's not actually as evil as Kira is, and is rather fond of Laharl(although how she expresses it is...questionable). During the climax of the story attempts to reject Kira from her body, causing Kira to try a forced takeover. Cue Etna going "Hey, are you really find with a girl's body?" Kira hesitating, and Flonne casting omega heal on him, blasting him to shreds.

Flonne is all kinds of awesome in this book. Haven't read too much about Ozonne yet.