The Library [1]: What?

"Huff! Huff!" Varian panted heavily as the ghost ship crashed and his body was thrown into the air.Since the ghost ship's speed was too high, he didn't have much time to react.Varian instinctively stretched his hand towards his left and clenched his fist. An invisible force wrapped around Sia and stopped her from moving, thus keeping her safe from collisions.But Varian…"Ouch."He slammed into the top of the spaceship. It didn't hurt much, but it was very rare for him to experience something like this.But he didn't mind it one bit and kept his eyes locked on the unconscious girl.The first thing he did after landing was to check Sia's condition.'She's still fighting against the hostile chi.' Varian sighed in relief.Then, he turned around and saw Boo scratching its head."Boo?""Master…there's some restriction here."Varian rubbed his forehead. This was a headache.Right. What was he expecting?If even abyssals had devices to restrict Boo, then shouldn't devas also possess them in plenty?