They're called Frost Giants for a reason, y'know.

He inclines his head in greeting - partly so that he can hide that smile that's threatening at the sight of Thor tackling Yuuma's face.

"It's been some time, yes. I rather became caught up in my own studies and travels."

Because he'd ended up staying as well, but that didn't mean he'd felt the need to stay in one place when he realised they were basically in a sort of hiatus.