Floor Four
As we entered the Library of Infinite Beginnings, the ones who had already beaten the third floor's Gatekeeper just went on ahead, while the ones who haven't yet stayed back to beat it. According to Xiang Peng, the Gatekeeper she faced had been...
...A rabbit.
Yes, yes, I know. A rabbit - how harmful could it be? That was the girls' reactions when they first heard it. But from what Xiang Peng said, this rabbit was no ordinary fuzzball. It hopped around speedily, looking for openings - you had to be really careful to always keep track of its location, especially since it could change its position with one single leap. Its small frame and nimble movements also made it hard to hit, but that wasn't even the worst part. The most important thing here, was that...this bunny was out to kill you.
Yep, that's right. A killer rabbit.