Qrow Branwen/Affiliation

Signal Academy
Qrow is a staff member at Signal Academy.

Ruby Rose
Ruby is Qrow's niece. Qrow is responsible for teaching Ruby how to wield her weapon, Crescent Rose.

Ozpin
Ozpin expresses familiarity with Qrow's ability as a scythe-wielder, referring to him as the only other wielder he knows of who is as skilled as Ruby.

In Black and White, Qrow sends a message to Ozpin's scroll that reads, "Queen has pawns", suggesting an ongoing collaboration between them regarding apparent threats.