This isn't a role for a human character with dialogue like a lot of the others and the amount of recordings required will actually be rather small, pretty much just make weird curious animal noises into the microphone that sound something like "nook", the wobblenook appears once in episode 3 and while it's possible it may appear again later we can probably use the same recording for it

A strange mythical creature which pretty much consists of an eyeball on a pair of long legs overall it is about twice as big as an adult human.