[Unohana would roll her eyes at the other two shinigami's antics, but a) she doesn't roll her eyes, ever, and b) she's used to them. So she just smiles indulgently, and turns to Lucifer-san to accept the compliment.]

Why, thank you, Lucifer-san. But for a gift, the intentions of the person giving are more important than the perfection of the gift itself, you know that.

[Or maybe not. In which case, well, she's telling you now.]