So after thinking a bit... it's entirely possible (I did just choose her codename out of the irony of it) that Marissa misheard her codename and assumed it was Listener when Glistener might have been actually what it is. It would be entirely in character for that mistake to happen.

I see a lot of people Listener is going to love to get along with.

I also agree with everyone about a little bit of action, I'm pretty sure Listener is not going to settle well with a quiet boring life and will make her own action from time to time.