"It is a staff, and there's even a dirty song about the knob on a wizard's staff I can teach you." She moves in to help him stand and, presumably hobble back to wherever he's settled himself. "Rumour has it that there's a knob on the end that all the young ladies adore."

Lu doesn't seem even slightly put out or surprised by his scarring. It's unusual, to be sure, but she's from a time with all manner of common and magical skin conditions. Strange looking, but without anything weeping fluid (...ugh), she won't balk at moving him as needed.