Board Thread:Questions and Answers/@comment-71.56.210.91-20130515225754/@comment-86.129.47.119-20130622172547

Here are two theories:

1. She was already altered. Some of the stuff got spilled into her mum during her pregnancy. Instead of harming her, it altered April..... making her body and brain tougher.

2. She is descended from some mythical being from Japan. She may not be magic, but she inherited their physical toughness.... such as immunity to things which would end a human's life.