I mean, I think even with the resolution of those s3 arcs, Marina and specifically Carina could have had more story, the writers don’t seem to see her as a regular yet, like could you imagine her getting the amount of story the non-Andy characters get even? I get that the rest of the characters are a close-knit unit, she can’t exactly slot in easily as even another friend, nor even would she necessarily want to, being their boss’s gf (I almost said wife, heh), but this is also a fictional show where the firefighters are the leads, she’s gonna have to be more about them in some way or another.
But yes, yes, they are SO comfortable and easy with each other, it’s pretty amazing every ep that no like, awareness or self-consciousness or awkwardness is suddenly going to creep in, it’s just SO natural. But yes, I love it. 🙂