The Black King first appeared during the first episode of R2 at Babel Tower as a Chess opponent for Lelouch. He also has a reputation as an excellent Chess Player. Whether he earned his reputation because of his skills or by using illicit means is not known. He is killed by the Royal Guards that were monitoring Lelouch under direct command of the Emperor. (Source: Code Geass Wikia)
A woman who embodies the collective consciousness of C's World. She appears to Leila after she first activates her Geass, telling her that she had originally lost hope in mankind as anything but selfish and cruel. However, the nature of Leila's Geass has caused her to reconsider that perhaps humanity isn't all bad after all.
An enigmatic figure with a fishbowl for a head. He often appears often shortly after rainfall and will suck the blood of anyone bleeding near water, thereafter turning them into a goldfish.
A devil girl who planned on biting directly onto Kohta and sucking Lady Emmaniel out. The stereotypical anti-vampire items made her fly off, though, before she was even successful.
Huey's friend who was assigned to the same air base as him in their air force age. His father is an owner of a famous shipbuilding company.