Board Thread:General Discussion/@comment-26529154-20160209144808/@comment-26461811-20160209152648

Anyway, it means there is one girl in YanSim that has no siblings in this universe, her dad is a scientist, and she would be the girl's sister (let's call her FUN-chan, shall we?) and so this FUN-chan is a Gaster-Like being.

I've checked on the fantom girl in the bathroom to see if it was actually her, but nope, she's still the same.

Now, who could be Fun-chan's sister? since the father is a scientist, it's not Yandere-chan's sister, probably not Kokona's either. Someone has a guess?