Board Thread:General Discussion/@comment-11469381-20140803025547

Ther views on each other and their relationship have changed since they both met.

In karai's vendetta, they fought and learned a little about each other and discovered that they actually have a lot in common.

In target April O'Neil, karai hunted her down out of jealousy and bragged about her years of training.

In the Manhattan project part 2, April along with the rest of the team discover that karai is really splinter's biological daughter to which April refers to her being an evil witch.

In the wrath of tiger claw, karai chased down April just to talk to her/not fight. She then opened up to her about everything that has recently happened such as the Shredder's deception and possibly betraying him as well as accepting the truth that splinter is her biological father. All of this instantly surprises April. When the turtles arrive, April tells them that she believes that karai believes all of this showing that she may actually trust her now. It is must likely that they are friends and are now on the same side. 