The second Biscuit robot created by the professor. His appearance is similar to the old model Biscuit No. 1, the only difference being the number of the hat. Unlike Biscuit No. 1, Biscuit No. 2 was built with the intention to speak. (Source: Wikipedia)
A coal miner, and one of Jörmungandr's and her sister's 5 fathers. (They adopted them)
The main characters homeroom teacher. Shown to be very witty and banterous. His hatred for Sasazuka-kun is also very clear from episode two.
He discovers the "Superbook" which can send him through time to visit the biblical eras.
Asami is an idol-in-training.