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Borrowing from Japanese ヤンデレ (yandere), a portmanteau of 病んでる (やんでる, yanderu), contraction of 病んでいる (やんでいる, yandeiru), progressive tense of 病む (やむ, yamu, to be sick), and デレデレ (dere-dere, to become lovey-dovey, infatuated, lovestruck).[1]
Developed on the model of tsundere (being cold and even hostile towards another person before gradually showing a warm and caring side over time).


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yandere (plural yandere)

  1. (chiefly Japanese fiction) A character, usually a girl, who fits the archetype of being genuinely kind, loving, or gentle, but suddenly switching to being aggressive or deranged.
    • 2009 October 4, sanjian [username], “Re: Bakemonogatari - comments on the end of the TV broadcast”, in rec.arts.anime.misc, Usenet[1]:
      And it finally answered the question as to whether Senjougahara is tsundere or yandere.
    • 2012, Jazmine Brusola, Rabble Rousers: A Fate/Zero Anime Review[2], Flyleaf (Ateneo Literary Association), page 14:
      Looking at anime charts, there's always the harem series with the dense hero and a bunch of girls whose personalities are pulled out of a set cast of tropes (the Childhood Friend, Tsundere, Yandere, and Lolita, for instance).
    • 2014, Olivia D. Knight, Please, Let Me Be a Seiyuu!, BookRix, ISBN 9783730998380, page unnumbered:
      “Believe it, man. In fact, she's seriously creepy. Like creepier than that pink-haired girl from Future Diary.”
    “Wait, what?” Sam got that reference quickly, but was not happy with the comparison. She wasn't a psychopathic, murderous Yandere stalker, from what he could see.


Related terms[edit]



  1. ^ Richard W. Kroon (2010) A/V A to Z: An Encyclopedic Dictionary of Media, Entertainment and Other Audiovisual Terms, McFarland & Company, ISBN 9780786457403, page 760