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From Japanese ヤンデレ, a portmanteau of 病んでる (yanderu, "to be sick", contraction of 病んでいる (yandeiru), progressive tense of 病む (yamu)) and デレデレ (deredere, "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").


yandere (plural yandere)

  1. (chiefly Japanese fiction) A character who fits the archetype of being genuinely kind, loving, or gentle, but can suddenly switch 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", Flyleaf (Ateneo Literary Association), April 2012 - February 2013, 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 (2014), ISBN 9783730998380, unnumbered page:
      "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.
    • For more examples of usage of this term, see Citations:yandere.



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