Anti-tsundere is simply a yandere. But I think your way of reasoning has a problem: everything has is opposite, so every manga has an anti-something. I can also affirm that a tsundere is an anti-yandere and say that every manga with a tsundere is an anti-something manga.
Unless you meant something like an anti-cliché character (like a strong harem manga lead instead of a "cliched" weak one or something similar) but I don't think it's what you meant.
From wikipedia:
Tsundere is the antonym of yandere, where a person is initially loving, then combative, often brutally so.
An example of yandere personality is Yuno from
Mirai Nikki or Akazukin from
Toukyou Akazukin. If you want something specific (like anti-tsundere = yandere characters) I can cite some more, but if you just want anti-characters I already explained why I can't be helping you.
Last edited by reid1 at 2:33 am, Aug 28 2008________________
What I like in Trivial Pursuit style. Pick your category:
