The characters are:
Rocky: Lawyer from Cantor-Fitgerald who lost her husband and home in the collapse, though not her cat. He has developed full psionic powers.
Jon: CIA agent who was near the Trade Center when the planes hit, and was caught in the collapse, with Rocky's cat, and has developed body-altering powers.
Shadow: Rocky's cat who was mousing during the collapse, and got trapped with Jon. He's developed a were-cat morphing power.
Artis: Was visiting his Cantor-Fitzgerald with his elderly aunt when the first plane hit. She died instantly, but he developed magnetic control powers.
Derrick: College student whose apartment was damaged by a piece of plane, and has turned into a cyborg.
Aidan: Irish hacker with a penchent for things mystical, who has developed cyperpathy and magical abilities.
Jennifer: NSA agent investigating the collapse site who has developed super-speed and electrical powers.