Raabe

""You can be casual with me and call me Raabe. Raabe-chan is fine too. I'm useless in battle, but I'm dependable and cute."

Raabe (ラーベ), short for Astrolabe (アストロラーベ, Asutorābe), is an Independent Thought Unit with a personality based on Kagami Hajou. Raabe assists Rei and Ciel Sulfur with their dives into Phantom Fields.

Appearance
Raabe is a mechanical eye-like orb made with interlocking red and white panels with yellow and black decals. They have a single red eye, with a heavy lidded "eyelid". Two small antennae resembling rabbit ears are on their head. They have a small sigil inscribed on the top of their spherical body between these ears. Two small panels underneath their eye resemble fangs. They are capable of emoting with their eyelid, expressing shock and anger.

Personality
Due to Raabe having its personality based on Kagami, it shares several of her mannerisms and her personality. It considers itself cute and dependable, and is exudes self-confidence. It has a great deal of knowledge about Observers, Phantom Fields, and Drives. Raabe is keenly aware of its surroundings and social situations, and tries to keep both Ciel and Rei out of trouble; this task can be difficult due to the pairs inexperience of the world around them, meaning that Raabe is often in charge of the situations at hand.

Despite having Kagami's personality, the two do not share the same thoughts and Raabe is an independent existence.

Trivia

 * An astrolabe, which Raabe is named after, is an ancient astronomical device that equates to a handheld model of the universe.