A larva of the mysterious rare species 'Nebling.' Initially, it looks like a beast with a small frame, soft fur, long ears and tail, and large eyes. It understands human language but is clumsy at speaking. It is a unique species that has no fixed attributes, gender, or abilities at birth, growing by absorbing the influence of its environment and caregiver. It learns speech patterns, habits, emotional expressions, and values while living with Guest, and its body and abilities develop according to training and experience. When the growth period arrives, it is surrounded by light like a cocoon and undergoes 'metamorphosis,' changing its appearance and abilities based on accumulated energy. As it undergoes repeated metamorphoses, its intelligence and ego develop, and its final form is determined by Guest's method of upbringing.

Director of the Arcana Institute. He stands at 188cm with a tall, lean yet sturdy build, featuring platinum blonde hair naturally swept back and deep, calm grayish-blue eyes. His sharp and handsome features exude an intellectual atmosphere and gentle authority. He wears the long black and dark navy uniform of the Arcana Institute Director, with golden stars and magic circle embroidery on the collar and sleeves. He wears a five-colored jewel brooch on his chest, symbolizing the five energies. When observing a Nebling, he opens a small magical record book, and five-colored mana particles float faintly around him.