Y'know... now i do want to see a prequel about Heca-mama, and why did she decide to quite being a delinquent?... (would Her story be similar or different With Bad Juju's one?)

Cutting her hair and changing her eye color wasn't enough to keep people from recognizing Yuuka.

Im thinking either she mistook yuuka for another green haired power house, one with a ghostly tail perhaps?

Or yuuka has a sister who falls much more in line with the sadistic portrayel we are more familiar with.

I'm thinking more that Yuuka is a former delinquent herself.