Fake Jack Atlas

An imposter disguised as Jack Atlas, who appears and causes havoc to frame his namesake.

Biography
Theorizied to be a Riding Roid, whoever this impostor is, does seems to share a connection to the Infinity Trio.

Facts to support this are various, pointing out the appearance of the Infinity symbol before the duel commences. Thus the damage cause on the duel is real.

Furthemore Placido, Jose and Lucciano are confirmed to be seen on episode 84.