Board Thread:General Discussion/@comment-24934890-20170925142224/@comment-4010415-20171009012403

It's extremely obvious that Sun, at least, has romantic feelings for Blake. It's not just that he focuses on her a lot, went directly to talking to her in Welcome to Beacon after he introduced Neptune to everyone, and asked about Blake while Weiss and Yang were preparing the ballroom for the dance. Though, those things all added together do provide a hint. There's also the fact that Sun asked Blake out to the dance. In Volume 3, they were gathered on the docks, right before Ruby and Weiss left to look for Jaune and Pyrrha, Sun turns and looks specifically at Blake.

So, there is a possibility there, and there is romance implied.