Board Thread:Speculation House/@comment-14138255-20160807005311/@comment-4010415-20160904035301

I kind of like to imagine that either...

Team SSSN was forced to go back home with the other Haven students, and Sun is upset about that. When he sees Ruby, he'll ask if anyone found Blake.

Or

Sun decided to stay in Vale and search for Blake, so he ran off before they could make him board a ship back to Mistral. She has just managed to elude him all these months, but he's still searching.

Considering they said the timeskip is 6-8 months, if he's not with Blake, then I think he's in Mistral because it might be hard for her to elude him for 6-8 months. If he's back in Mistral, it might not have been by choice, considering how much he seems to care about her.