I like all of them the same to tell the truth but if I had to write anything it would be. Ruby x Weiss, Blake x Yang
depends on what we are talking about Character design - Weiss >Yang>Ruby> Blake Character Growth Yang >Blake> Weiss > Ruby Best in terms of action scenes Ruby> Weiss > Yang >Blake Best Waifu material Blake>Ruby>Weiss>Yang
I only saw few seaon 1 episode and listening to 'I May Fall' i do know the spoiler that happen to certain character due to fanfiction. So Ruby Blake Yang and Weiss is my ranking.
Lets see, Blake is worse than shit ( just like the show post s3/4 ) so she is last. Not really a fan of yang, so third. Ruby, second. Weiss, first.