The anime series Witch Hunter Robin featured an extensive cast of fictional characters designed by Kumiko Takahashi. The series takes place on a fictional modern-day Earth where the Solomon organization fights the harmful use of witchcraft using a database of witches, those who have obtained the power of witchcraft through genetics, and those who carry the gene called "seeds" in order to arrest them or to employ Hunters, people who hunt witches, should their powers "awaken".
The series' titular character is Robin Sena, a soft-spoken 15-year-old Hunter and witch with pyrokinetic abilities. She is sent to Solomon's Japanese branch, the STN-J. There she meets five other Hunters: Amon, Haruto Sakaki, Michael Lee, Miho Karasuma and Yurika Dōjima. The antagonists include Takuma Zaizen, administrator of the STN-J. As the series progresses, Robin's witch power strengthens and she is hunted by the Solomon organization.