Kingdom Bros: Episode 5

When we left off, Sora had found a new friend in Roxas, a mysterious and very grumpy boy who appeared shortly after Riku had his nightmarish experience with Winnie the Pooh. Sora and Riku are currently not speaking to each other, and their broship seems to be headed for the end

But what about Roxas? Who is he? Could he be connected to Pooh?