It was a pretty sympathetic portrayal of the undead and it raises moral questions about the wholesale killing of them if they retain some sense of reason. This zombie kid had enough sense to understand what Boxxo said, go seek out a coin, and then track down Boxxo when he was in an unfamiliar location. That takes some amount of brain function.
I was expecting the kid to be somehow connected to the floor boss, but it looks like the boss fight is queued up for the finale so Lammis can try to overcome her fears.