Arthur smiles back at Willow, and waves a little nervously. He was happy to see his return was welcome, since he was expecting a worse reaction when he walked in the door. "Hey, Willow. How have things been since I left? World still turning, weekly apocalyptic events? Your dad still balding?" The last part may be an actual question, or it may be a joke at Warwick's expense, but either way it's not meant for his ears.