J's Chimes: Anime's Character Origination

I may be wrong but based on what I've seen in the past, I believe that the origination of the atittudes and characters of anime girls comes from the classic game called Tokimeki Memorial. A popular love simulation game in Japan back in the early 90s, this game turns into an anime and franchises of various household items from stickers to stationery that time. Till then various animes have characters with atittudes and stuff from what we would see as of today. And that's about when Yandere, Tsundere and whatever starts coming out of the otaku dictionary...