Board Thread:Off Topic/@comment-2.96.106.45-20131022215901/@comment-18396318-20131023224815

There's a handful of reasons.

1: It's fiction written by (primarily) guys, so lesbians are pretty cool.

2: Ruby and Weiss were the first two characters revealed for the show, and people wanted to write fan fiction immediately. For there to be any romance in it at all, it had to be between those two, which allowed it to really take hold in the community.

3: Weiss is a tsundere character. "Tsun" meaning angry, and "dere" meaning love, or something along those lines. Ruby is getting the bulk of the tsun from her, so for a lot of people, the logical conclusion is that she'd get the bulk of the dere.

4: There are two male characters that even have a remote chance of being paired with them, and that's Jaune and Ren. Jaune seems to be taken by Pyrrha, and Ren by Nora. Ren also seems to be totally incompatible with Ruby or Weiss, so unless people are going to break the Jaune x Pyrrha pairing, there's no possible straight pairing for either of them. Since they seem to be BFF's (despite Weiss' outward actions), it seems like the natural solution.