Leader of the Black Crow Unit and a skilled swordsman. Initially warns Touma about Arisa, but later uncovers Ladylee's role in her father's death. She plays a pivotal role in the climax and reconciles with Arisa.
Ladylee murdered Shutaura's father, leading to a violent confrontation and stabbing.
Touma physically confronts Shutaura at the climax to stop her from sacrificing Arisa.
Arisa's existence is born from Shutaura's desperate wish to save passengers, creating a deep metaphysical bond.