Nigon is the second underground race.

Your rabbit made me smile =). It reminded me of the game Rayman Raving Rabbits))) I think it looks like the rabbits from there.

Regarding humanoid appearance: indeed... I didn't even notice. I think it's cool! So, Nygon will be unique. After all, he's the only humanoid one. Only the humanoid nature of the monsters is questionable, but never mind... We're the ones who decide, so they will be humanoids.

And what does this look like? (.Y.)
P.S. Maybe I didn't depict it correctly, but it's something like that.