In chapter 3: Radiance and Corridor head out on an assignment. And the trio receives a threat from Headquarters.

Confidential: For Defenders of the Light internal circulation only
Corridor
Age: 24
Age of power manifestation: 14
Civilian identity: Riku Miyano
Hero type: Elemental/spatial
Power set: Corridor opens what have been termed “dark corridors,” which serve as doorways from one point in space to another. The corridors must be traversed: it does not open an immediate portal or doorway from one place to another, but the distance between entrance and exit points is greatly reduced. The way the distance scales is not perfectly consistent, but one test found that crossing the length of the city took approximately 50 seconds. Corridor must have been to the place he is attempting to travel to, suggesting that his conception of a place is part of what allows the passage to be opened. He can bring other people with him through these passageways.
Profile: Corridor’s powers manifested at 14 and his family immediately brought him to the Defenders of the Light for training. He may have known Keyblade prior to this, as they came together to the Defenders of the Light. He served as a member of the team for a few years without incident, though at age 16 became a villain during the Heartless Crisis. He was brought back to the Defenders of the Light, and it is believed that his past mistakes are genuinely behind him. Has close friendships and most frequently partners with Keyblade and Radiance.
( Chapter 3 )
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