Yeah, they show plenty of signs of intelligence, and lots of personality to each one.

[Could he be Zack without the puppy?] Ah! Yes... it is quite unnerving when what used to be the simplest of tasks is no longer even possible. [He nods sagely, a slightly worried look on his face.] Do you have someone to travel with? It's not necessarily dangerous here, but it's always better to travel with others.