Board Thread:Episode Discussion/@comment-34633327-20171118002715/@comment-26397825-20171122235354

A bond doesn't have to mean a romantic or familial bond. Platonic bonds exist as well.

They were teammates for four years. Even if she didn't like him or want to stay with him, that sort of close proximity and fighting alongside a person for four years straight creates bonds between people. Haven't you ever heard of 'Brothers in Arms'? She thinks he's a fool for following Ozpin, but even she recognises that being teammates created a bond between the four of them.