She'll just thrust her arm at his hand then, as she moves closer, she's not very good at social things yet Ratchet so don't mind the bluntness of her motions.

"This Unit is referred to as Miria," she replies, idly sizing Ratchet up. "You are injured, should you not be getting repaired instead? ... Also This Unit has built in weaponry within the damaged area."

Yeah, she should mention that since she's got a lot of weaponry. Miria may not know Ratchet but she certainly wouldn't want to injure the medic more.