The interaction between Weiss and Ruby in the volume 3 finale is some of the best stuff in the entire series in my opinion. They have such a trust and quiet understanding with one another. The way they reach out for each other.
The way Weiss stands in front of Yang, trying to shield Ruby from seeing her sister in such a way for as long as she possibly can
To Weiss’ immediate insistence on following Ruby into an unknown fight because she refuses to let Ruby go into it alone.
To their final moment where Weiss, a girl who once told Ruby she didn’t belong anywhere near Beacon, told that same girl “you can do this” with such confidence and support.
It’s only my opinion, but I think they have the best partnership in the show. They’ve come so far and reached a point where they bring out the absolute best in one another and if THIS is what they will be like when they reunite and as they go forward - I can’t wait to watch.