Yandere (ヤンデレ, Yandere?) is a Japanese term for a personality that is initially loving, then deranged or psychotic, often brutally so. Yandere is a combination of the two words yanderu (病んでる, yanderu?), meaning to be sick, and deredere (デレデレ, deredere?), which is defined as exhausted or lovestruck. Much like the tsundere term, there is also the related noun yanderekko which refers to a girl with a yandere personality

Yandere

One of the best-known examples of the yanderekko is Kotonoha Katsura from the visual novel School Days. After becoming Makoto Ito's girlfriend early on in the story, Makoto is later stolen from her by Sekai Saionji, a young girl in Makoto's class. One of the bad ends in the game was with Kotonoha murdering Sekai by slicing open her throat with a saw in broad daylight. Another example in a similar situation is Kaede Fuyou from Shuffle! where, after falling in love with Rin Tsuchimi, the male protagonist, turned unexpectedly cold towards Asa Shigure who was receiving most of Rin's affections. Ultimately, she experienced a psychotic episode where she expressed the desire for Asa's death (anime-only event). From Higurashi no Naku Koro ni there is Shion Sonozaki. Shion turned psychotic in the Watanagashi-hen and Meakashi-hen story arcs after having two love interests taken from her: first Satoshi Hojo and then Keiichi Maebara, the male protagonist. Shion ended up brutally murdering three of Keiichi's close friends (including her own twin sister), a family friend, and even her own grandmother before attempting to kill Keiichi himself; though he initially survived, the game's TIPS states he died three days later in the hospital due to heart failure brought on by hallucinations. Yuno Gasai of Mirai Nikki has been considered as an example of a yanderekko, as this cute, but psychotic, girl is also extremely cold-blooded when committing the act of murder.

Yangire

Possibly one of the better-known examples of a yangirekko is Rena Ryugu from Higurashi no Naku Koro ni. First in the Onikakushi-hen story arc where she is first shown as a nice, sweet girl, but later becomes intimidating and violent towards Keiichi Maebara. In the Tsumihoroboshi-hen story arc, Rena is shown possessing a strong intent to kill several people, even managing to kill two people: one in self-defense and the other in cold blood to protect her father. Another example is Sekai Saionji from the anime version of School Days. While initially portrayed as cheerful and normal, in the final episode she snaps when Makoto tries to dump her and stabs him to death with a kitchen knife.

Tsundere Group
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