Ruby and Weiss meet at Beacon when Ruby accidently knocks over Weiss' expensive luggage that happens to be full of Dust. This puts the two on bad terms to begin with. When they meet again in the Emerald Forest, Weiss' first instinct is to walk away, leaving Ruby behind, despite the rules being that the first person you see it to be your partner. She only decides to partner with Ruby after seeing that her other option would be Jaune Arc. Their relationship improves over the first volume after Weiss sees how hard Ruby is trying with her school work and leadership duties.
Ah Ruby and Weiss. This ship in my opinion probably has the best and most fan art and is also my personal favorite behind a lil Bumbleby; but I have a theory on why White Rose may very well be canon. Ruby and Weiss start off completely hating each other, they don't get along in battle or personally. But eventually it's Weiss that warms up to her not Ruby.
She is a Huntress , a former student of the now-defunct Beacon Academy , and former heiress of the Schnee Dust Company. As the former heiress of the vastly influential Schnee Dust Company, Weiss made her first appearance in the "White" Trailer. She is the younger sister of Winter Schnee and the older sister of Whitley Schnee.