She doesn't hiss or flinch; her muscles don't even contract under the blade. She just keeps her eyes on him, breathes in and out. In the larger scheme of things the pain is pretty minimal anyway, so it's not like it's a struggle but River is half-sure that not reacting at all is not the thing the normal girl her age would do.

Since there aren't any around to ask or imitate, she'll have to do her best with what she's got.

"Not your design or intention." As he pries the device out of her skin, River closes her eyes. "What should she call you?"

She's pretty sure 'Bruce' is not on the table, and that's fine, but it's not a bad name.