Buddy .... chill d´fug off, there is no need to overreact like that.
First off, she was a Slice since the very beginning. She is a ninja, what the heck did you expect ? Magic ? come on...
Secondly - they are putting multiple slice girls after each other because THERE WAS NO SLICE 4 events in a row !
They screwed up on the release by ignoring slice for 4 events and now they are making up for it by multiple slice events.