kirakero comes from my real name, and my older screen name
Kero is the beast from an anime called Cardcaptor Sakura. I chose to use that name because the beast was genderless. Thus I could use it and not be defined as girl or boy online in my period of 'self awakening' and 'identity reconstruction'.
Kira is two things: One, derived in my case from kero. (I had a friend who liked Kita as her name, so... all around the same lines). Two, there was a girl in my seventh grade class, her name was Kira... She was the only person to show me absolute kindness in middle school. I ended up going to home school, but I still remember that day. Coincidently, she is the only Kira I know from the real world, beside me of course.