Though the Harbinger isn't completely acquainted with the workings of a creation like Scaramouche, he's had plenty of experience tinkering with broken toys and other mechanical objects he's brought home for his siblings. Some of them are huge, the ones that sit in the backyard for them to play with. And of course they break from time to time, a teary-eyed Teucer begging his big brother to fix it, and of course the toy salesperson has to put his money where his mouth is sometimes. He thanks the Tsaritsa everyday now for the knowledge he's gained from that, taking note of how Scaramouche is able to move some of his limbs now, the arm repaired, proud of his work.

He looks over to the second harbinger's former underling, nodding at him to do as the puppet says. That is one of the things they needed to address today, and this is also why Childe needs Scaramouche awake. The guy knows his body better than they do, so it's best to have the expert with them as they work.

"After we're done, you'll barely know they were ever there to begin with."

He doesn't say it as a reassurance, but rather as a confident statement that the promise that Childe has made will be fulfilled. The engineer gets to work immediately, sighing inwardly at the damage. It's pretty bad, and they'll have to cut out the attachments, but at least it can be repaired.

"While he works, tell me how your arms and legs feel right now."

Because that's his own personal handiwork, and there's a large tool kit on the floor that he'd been using to do the repairs. Everything is complicated on the puppet, so he's prepared to make adjustments according to Scaramouche's wishes.