Winter Schnee/Affiliation

Atlesian Military
Winter appears to be a member of the Atlesian military, as demonstrated by her referrals to General Ironwood as "sir".

Weiss Schnee
Although initially cold to Weiss, Winter appears to have genuine concern for her sister's well-being, inquiring about her social life and eating habits. However, her methods of demonstrating this affection are rather unusual, as she rebukes her sister for misinterpreting her previously-mentioned inquiries.

James Ironwood
Ironwood is Winter's superior in the Atlesian military. As such, she has great respect for Ironwood and follows his orders almost without question.

Qrow Branwen
Winter appears to be previously acquainted with Qrow. They seem to have a preexisting enmity and very little mutual respect. Winter responds to him with hostility, and Qrow seemingly enjoys provoking and angering her. In "It's Brawl in the Family", this culminates in a battle in the middle of Beacon Academy's courtyard.

Ruby Rose
Winter appears to think little of Ruby upon initially meeting her, commenting she is "appropriately underwhelming". She is, however, thankful to Ruby for "taking an interest" in Weiss.