Robin Sena  

, 瀬名ロビン

15-year-old girl named Robin Sena possesses a mysterious origin and wields powers similar to those of witches she hunts. She was raised in an Italian convent before joining STN-J, where she developed fire craft that allows her to manifest varying amounts of fire. Additionally, she can channel energy into shields capable of blocking both solid matter and magical powers from other users like herself. However, using her power causes her eyesight to weaken, reducing the accuracy and effectiveness of her pyrokinesis. Robin prefers not to wear glasses despite their ease in solving this problem. Despite being good-natured, she has employed her gift lethally when necessary for the greater good or to save someone's life.