Well, she has an owner back home. And friends that make sure that she looks presentable, too.

So even though she lacks a collar, she's clearly well-fed and healthy (though that also has to do with her being a shapeshifter), and she's way too easy with being all up in Haseo's personal space for a stray, too.

So she can see where the guy's thoughts are coming from, but she still mentally rolls her eyes at them.

Why is that always the first thing that humans ask?

She doesn't expect him to hear her - the vast majority of people needs to be on deepweed to hear nonverbal speech when it isn't telepathic communication directed at them. And he would have noticed that something about her is off if he could perceive astrally. So she can just run a commentary on his words, as far as she is concerned.