Hitomi Tanaka- one of the most popular/recognizable Japanese pornstars out there, due to her big-sized breasts and cute, as well as seductive nature.

The thing is spoilers if you haven"t finished the first season:

Some of these characters are gay/family members and creatures, and CCBill doesn't allow creatures or taboo subjects to interact with one another, therefore, the story and sex scenes wouldn't make any sense and would leave work out.

Thank you.