pronoun
Casual first-person plural pronoun, mainly used by women. Can include the speaker and their in-group.
うちら、明日映画に行かない?
Hey, want to go see a movie tomorrow?
うちらはいつもここで待ち合わせしてるんだ。
We always meet up here.
pronoun
Casual first-person singular pronoun, mainly used by women. Can sound softer or more familiar than 私.
うちら、そういうの苦手なんだよね。
I'm not really good at that kind of thing.
Derived from 内 (uchi, 'inside, one's own group') with the plural suffix ら (ra). The exact historical development is uncertain, but it is a natural colloquial formation.