A character from [i][[Getsuyoubi no Tawawa]][/i]. The younger of a pair of identical [[twins|twin]] [[sisters]], the other being [[yang-chan (tawawa)|Yang-chan]]; she has [[medium hair]] which she typically wears loose, and has a calm, largely unflappable personality.

Named from how [[Himura Kiseki]] described her as the "[i]yin[/i] younger sister" in "this tweet":[https://twitter.com/Strangestone/status/1406811622291636230].
yin-chan (tawawa)