Too cheerful? Him? Perish the thought. But his grin indicates that he's pleased at this concession. "Deal," he agrees cheerfully. "I'll be on my best behavior."

He shifts his arms a little lower so he can actually pick his friend up comfortably, rather than just give the suggestion of it. He'll let Hades make the move to come close enough, though - it seems reasonable to give him at least that much agency.