Shrey Diack is a soldier of the UFS. Though she believes in the mission, she seems to hesitate to attack demon's that didn't do anything wrong. She questions authority, is upfront, talkative and upbeat. She can be a bit daring and competitive, which can bring her into trouble.

Furthermore, she doubts the righteousness of the UFS. Shrey says that she is not a mindless machine, that blindly and faithfully follows orders without question. Appears in "What If" events. In the first heard rumors of a demonic beast near a harbor, the Fuuma Organization operated in. As she saw Fuuma Kotaro (TABA), she tried to bind him with her wire, to get him out of the way but was captured instead. Kotaro also investigated the situation and it was a pure chance encounter. In the end, she joins the Fuuma Organization after Kotaro's treatment. A follow-up event shows how Shrey now works for the group, having returned from a long-term mission. She tells Kotaro to visit her room for some fun, already wearing some rope bondage over her clothes. Though Kotaro didn't mind, he was sometimes also overwhelmed by her. Special Gear: Shoots a harpoon on a wire, binds targets. Tactical Skills High Physical Abilities.