Yeah, they do.

[Jean expression grows somber for a moment.]

Don't leave your work key laying around, or he might decide he likes it and then you have to take him to work with you every. Single. Day.

[Gulliver jingles and shivers over Jean's shoulder, completely unrepentant. He likes going to Starmiebucks with Jean, so it's all good as far as he's concerned.]

No, they have eyes so you can tell them apart.