"Well, then, perhaps Lazarus could look at the three of you and tell us more."
"I'll find him." She ruffles Céleste's hair and teleports Lazarusward.
"Hello. Céleste and Keziah appear to have materialized ingot powers telling them there is unspecified 'gook' on Giles. Before doing anything about any of this I thought it would be wise to consult you; will you come look at them?"
Lazarus peers at Giles.
"...You have a... something," he says. "It's definitely a something. A very subtle something."
He turns to look at the Griffins.
"And you have ingot powers!"
"It... seems that you can fix him," he says. "At least, you can definitely do something, and you're definitely calibrated to expect that it's a positive something, and ingot powers don't really lie... actually," he says, "in a very distant sort of way, you remind me of a unicorn I met recently. You especially," he indicates Keziah, "but it's not much of a difference. You're both... purifiers, I could say. You clean things up."
"I don't think your ingot powers know that," says Lazarus. "It's just a comparison, anyway. But yes... let me look at you again." He turns back to Giles.
"You have a... connection to... something," says Lazarus. "I might be able to get more details if we were in your world. But it's definitely hostile, although very dormant, and it's definitely the kind of thing that the girls' ingotry can get rid of for you. There shouldn't be any unforeseen side effects, unless you were depending on your connection to a malevolent force or entity for something."
"Not especially," says Giles. He sighs. He looks around for somewhere to put his tea, discovers a lack of any such place, and sets it down on the stairs in front of him very close to the wall. "All right, you may... de-gook me."
And they do - something.
And there is a vaguely chilly clean feeling left behind after they're done.
He turns away, turns back, picks up his tea, turns away a second time, and heads down the stairs in the direction from which he came.