Pyrrha Nikos/Affiliation

Team ANVL
Pyrrha is a future member of Team JAUN.

Beacon Academy
Pyrrha is a student at Beacon Academy.

Sanctum
Pyrrha is a graduate of Sanctum.

Jaune Arc
Jaune and Pyrrha first meet in the Beacon locker room as they are preparing for their initiation, and Jaune tries to hit on her as soon as he hears about her renown as a fighter.

Weiss Schnee
It appears that Weiss and Pyrrha have already met prior to joining Beacon, and Weiss is notably nicer to Pyrrha than any of the other first-years at Beacon, although this may be because she wants to take advantage of Pyrrha's fighting prowess.