@Pandora-the-Pandadad wow, it's Whitepod all over again. I'm personally in favor of the notes. Really amusing. Almost as amusing as all the children in the comments complaining about being too stupid to just ignore them.
I think this was a really mature way of handling his childhood trauma and bullying. Huge props to the MC and the author for delivering it well and in a way that sit right with the reader.
@Liquidxlax If I remember correctly, she can use magic, but must not use it outside the dungeon because other people would see it. They mentioned the reason in one of the earlier chapters.