Thread:Yoshimickster/@comment-27210664-20160127020710

http://turtlepedia.wikia.com/wiki/Thread:101670#103

Because there's good in her and her real name is Miwa. I think Ramona is a bit similar to Leorai. Besides, Leo has to fall in love Karai, so they're not blood-related. She was free from Shredder's control, remember? 