Keltham looks much the same, outwardly. His face is maybe slightly thinner.
To arcane sight... he's got a headband of +6 Splendour, gloves enhancing some skill, a +6 Constitution-enhancing belt, a ring of sustenance, glasses of... probably Arcane Sight, and various other filled slots.
Keltham is currently doing something with a flat metal plate inscribed with a complicated spellsilver pattern, spellsilver wires above that, and what looks like a scaffold or... something with a lot of moving magical parts that could not possibly be a spell, item, or anything functional at all.
He looks up at her when she enters the room.
"You look different," he states.