User blog comment:TimeSoul/Detentionaire: Season 1 finale/@comment-99.234.186.40-20120325002514

think it was the tassleworm. probably the old principal was mutated in to it. and since we all know that lee's father is in the conspiracy and they do lab technology, it highly likely. OR A Negima (who's the first principal) is the tassleworm and is trying to make lee expose the truth of the abandoned subway station.