Kuu Orla  

, クゥ・オルラ

A fourteen-year-old girl named Kuu is the youngest member of the Orla family. She has long peach-colored hair, wears a black dress, and carries a wicked tongue despite having a bishōjo appearance. Unlike her older brother Sui, she often complains about taking care of him and feels that she may never be able to become a bride due to this responsibility. Kuu also possesses a Rule Fragme known as "The Scythe of Ailuchrono," which is in the form of a large scythe that increases her strength, speed, and allows her to match up with Ferriss's speed. The blade can freeze anyone who comes into contact with it, which Kuu uses to stop Sui from bleeding to death. However, as a side effect, the artifact freezes the wielder's heart, causing Kuu to lose all emotional capacity when she is using it.