Hikaru Misumi, widely recognized by the superhuman alias Judas, possesses distinctive white hair and transitions visually from boyhood to adulthood. His emergence occurs significantly during the Shinjuku riots, an event pivotal to his path. Before this, he operated within the burglar group Diamond Eaters, the origin of his Judas moniker.

Judas wields unique abilities centered on electrical manipulation, primarily generating potent blue electricity. His expertise extends beyond offense; as a skilled doctor and scientist, he methodically augments or modifies superhuman abilities, enhancing biological or technological traits. He further applies his electrical generation for telepathic interaction, manipulating electrical signals within human brains.

His story intersects deeply with the Superhuman Bureau. He collaborates directly with Jiro Hitoyoshi on specific operations, such as a covert mission to infiltrate a secure location and restore the artificial superhuman Earth-chan. This indicates periods of alignment with Jiro's goals despite Judas's criminal past.