Something in Merwyn that had been expecting rejection lit up when Seamus responded to his slightly frantic energy with high energy of his own, that smile and that confident, friendly handshake. He tipped his head at Seamus, studying his face and trying to recall where he could place him. "Seamus?" he repeated, eyes narrowed and then widening with recognition. "Oh, Seamus! From the pub!" he beamed at his own recollection and memories of his nights there, although it turned a little self-conscious when he remembered the times he'd been too drunk to walk out under his own power. "Yeah, I must like owe you an ice cream by now." he teased.
He was momentarily taken aback by the outright offer of company but he didn't accept it as much as metaphorically grab it with all limbs and not let go. In reality he just bounced over to the counter and pulled his wallet out of a pocket. "No idea, how about you pick for me and we can go eat?" he suggested, gleeful at having found a friend.