Board Thread:General Discussion/@comment-30450220-20170626021526/@comment-24276094-20170827134721

Sun likely knows Blake is intersted in Yang though, in Vol 4, he keeps bringing her up, and throughout the series almost all their time together is when narratively Yang couldn't be with Blake, the one exception is the dance and Blake was with both of them. I think Sun wants what's best for Blake, even when that isn't him.