I wanted to do a comparison between the characters and the way they talk because it’s easier to refer to when trying to distinguish between speakers. I’ll be adding to it as I come across them but it may take time to go through all the chapters and find everyone.
*Note* This may not be 100% accurate but you may use it as a guide.
Just for reference in regard to the Sentences column:
Plain = Dictionary japanese・だ
Polite = です・ます
Other japanese = specific sentence endings.