Seth

Those who know of his existence call him an "assassin"; a feared young man whose true identity is unknown. He seems to be following the orders of someone, and will suddenly appear in front of those with special ability to challenge them to battle, but his goals and what he is are all shrouded in mystery.

A speed-type character, he specializes in closing the distance for quick, close-up attacks. "Captive Segment", a projectile that fires after some time passes, allows him to attack from both sides.