Origin
Japan
Robin is a tall, teenage girl with light brown hair, that she keeps tied up, few strands of hairs fall down while a few longer strands fall down onto her face. She has forest green eyes. She inherited these traits from her mother. Robin is half-Caucasian on her mother's side. She wears a long brown coat that reaches down to the ground. Under the coat she has a black dress. She wears a red necklace around her neck with a rather unusual design. She later wears her glasses whenever she uses her powers to fix her eyesight. Also she is seen in a biking outfit and in a waitress outfit, but Robin is always seen wearing black. Robin is calm and quiet. She rarely lets go of her emotions and can be considered an introvert. She shows empathy to her colleagues when she calmed Haruto down while he was being controlled by a witch and tried to help Amon even after he told her to leave when STN-J quaters was attacked. After being considered a witch, she tries to manage herself into not getting captured and is independent.

Witch Hunter Robin
To most of Society, Witches are nothing more than myths and legends of a bygone era. However, there are a few people who possess the Witch genome; a gene that may give the person special, supernatural abilities. For them, a secret organization named Solomon (STN) was formed to track and hunt them down before they became a threat to the rest of Society. The story follows the members of the STN-J, the Japanese branch of Solomon. Unlike other branches of the STN, the STN-J captures Witches alive. Armed with a substance called Orbo, an invention developed by Administrator Zaizen, the Hunters subdue the Witches of Japan and send them to a facility called the Factory. It was during one of these Hunts that a member of the team was killed. With morale falling, Solomon Headquarters sends a new Hunter from Italy to join the STN-J as a replacement for the fallen Hunter; a young girl named Robin Sena. Robin is only 15 years old, but she's a capable craft user.