Hmmm...I would say Kanon from The World God Only Knows. You wouldn't initially rank her as a yandere character, but later on she starts doing some really dicey stuff that...well, I won't ruin it for you, but yes...Kanon 100%
2018. ;)
Ooooo. Thanks for the request. It has been noticed.
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Oooo thank you for the suggestion!
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Spoke to the director about this. Since Hakumen is the embodiment of hatred and fear in general, the character technically don't have a gender.
Not sure if this is possible since it's outside the order in which the episodes were released, but thank you for the suggestion. It will be brought up.