Wei Wuxian wears his emotions readily, on his face. And while there's usually a smile, it's just as easy to see things like worry, curiosity, or distaste. The one he wears now is a little of all three.

It does make sense, he thinks, depending on the metal that was used. What sort of spells it was reinforced with. He'd even theorized such things in his research, when he was helping Wen Ning. Just like Wen Qing's proficiency with needles, when applied correctly, he was sure such an implant could have both devastating and beneficial results, but he'd just... never followed up on it. Wen Ning had recovered enough of his spirit to be in control, he'd thought there was little need. There were a number of meridians bundled at the base of the skull, at any rate, and if they were messing with those, sending things into her head, hmm.

"A~ah," he sighs, taking another sip, "I wish I could see the research that went into them. I was studying something like that before ah- before I died."

He raises a hand, expression tipping further toward curious as he reaches out, "is it still there? Can I touch it?"