Replica

Replica (レプリカ) is Yūma Kuga's guardian. He is a self-described "Multi-task Trion Warrior".

Appearance
Replica resembles a floating rabbit head, and is black in color. He has thin lines of light on his body, which represent his eyes and mouth. He also has two appendices on the top of his body which resemble rabbit ears, and two other, foot-like appendices on the underside of his body, which seem to serve as a landing support, but were never seen in use, as Replica is always floating.

Personality
Replica always gives Yūma advices, he tells him what's right and wrong. He also helps him in battles, like when he prepared Anchor + Bolt Quadra for Yūma.