Blue Hair Syndrome
A girl in an anime where she has a crush on the Main Character. The girl will usually have blue hair of any shade and do anything for the MC. Her feelings will be told yelling at the MC usually around an episode in the teens.
Weeb 1: Omg, Rem is such a good character
Weeb 2: You only say that because she has Blue Hair Syndrome
Weeb 2: You only say that because she has Blue Hair Syndrome