In order to keep the original definition intact, another term has arisen to describe girls who exhibit yandere traits but do not fit the true definition of what a yanderekko entails. This term, known as yangire (ヤンギレ), refers to characters who snap suddenly out of jealousy, irritation or something similar. Yangire is a combination of the two words yanderu (病んでる), meaning to be sick, and kire or gire (切れ), meaning to cut, slice, or "to snap". This behavior is different from that of a yandere character in regard to the motivation that sparked the change in the character. 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.

Intelligence agency term for "psychological operation". A government or corporate-sponsored operation, usually taking the form of a "terrorist attack" or "crazed gunman on a spree", with the intent of panicking the public into demanding more police and laws inhibiting freedom. Psyops are usually carried out by drugging a civilian or group of civilians with aggression-promoting drugs, psyching them up, arming them, and sending them out to commit mayhem. Government-sponsored terrorism. See also blackshirts, conspiracy

Like a Yandere, except they don't have emotional attachment. They just enjoy killing and violence.

Apparently, it's a yandere without 'dere-dere' part. I.e. yangire went crazy even without love - for exemple, 'cause of some tragic events in the past

A character that is a reverse of a Yandere character. He/She has nothing to do with someone or something, he/she just loves violence so much.

A person who kills for fun, not for a lover