She might still grow out of that. It could just be because she's small.

[Now that the tripod null seemed to be happy with being petted, the encounter in general was going a bit smoother. Though, Keith wasn't great at small talk, and he was getting the impression that Mikasa was pretty shy.

His own Null glitched to monochrome shading for a moment before switching back again.]

This one here seems to like you. [Indicating the affectionate one.] Are you going to take it with you?