Shantak-kun is Nyaruko's pet. A female shantak (monster in Cthulhu mythos; a bird with a horse's head and a bat's wings). Has many different forms including sizes as tall as a building or as small as a rabbit. Can also turn into different vehicles. According to Nyaruko, the eggs of shantaks are precious and expensive food in space, though Mahiro never accepts to eat them anyway. Nyaruko arrived on Earth by taking a spaceship transformed from Shantak-kun.