* AlternateCharacterInterpretation - Neither the audience nor the characters can read Koharu at all. Is she a [[StepfordSmiler pathetic girl looking for affection]], a girl who's finally found someone to interact with or a yandere stalker who will do anything to have a guy she barely knows all to herself?
** It seems to run on the family. Her daughter and mother are this as well.
* TheScrappy - Predictably, as soon as the ChildhoodFriend appeared, she was immediately despised by a large portion of the fanbase.(FanNickname: The Interloper)