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.
Angie is a recurring character in the anime and a member of Team Plasma. Although Angie wears a uniform standard to a female Team Plasma Grunt, her actions indicate that her position is higher than a simple grunt. Her overall appearance is based on the stock art of the female Team Plasma Grunt from Black 2 and White 2.