Yangire refers to characters who snap suddenly out of jealousy, irritation or something similar. This behavior is different from that of a yandere character in regard to the motivation that sparked the change in the character.

In short, the yanderekko is motivated through her love for the male protagonist, while a yangire character is motivated through other characters and will not be connected with emotions of love or attraction. Like yandere, the related noun yangirekko can be used to describe a female character with a yangire personality trait.

[From Wikipedia]