Who was the first tsundere character? It's not like I like tsunderes or anything, I'm just interested in anime history okay?!

I just happened to be on the site, so don't get the wrong idea!

Geez, j-just tell me who the first tsundere was already, Baka!



EDIT: For clarification, I'm looking for the first known character that expresses tsundere qualities, rather than the first character that was labelled tsundere.
According to The Otaku Encyclopedia: An Insider's Guide to the Subculture of Cool Japan, Lum Invader from Urusei Yatsura is possibly the first tsundere to exist (and also potentially the source of all moe)



Urusei Yatsura started manga distribution in 1978 and Lum's cold exterior (but in actuality being kind and loving) accrued her the title.

However, Sayaka Yumi from Mazinger Z (1972) appears earlier in history than Lum, despite the popular support for Lum's claim. Sayaka, whilst generally a pleasant character, is brutish and brash towards the main character's affections - despite having a crush on him.