Riehlvelt

Riehlvelt is one of the three fighters that challenge Gon and Killua on the 200th floor of Heavens Arena. Having reached the 200th floor without the use of Nen, he was "initiated" after being attacked with a malicious aura attack and paralyzed from the waist down.

Heavens Arena arc
Riehlvelt first appears when Gon and Killua learn how to use nen and reach the 200th floor. Along with his friends Gido and Sadaso, he tries to use Zushi as a hostage to blackmail Gon and Killua and win unfairly aganist them but their plans are destroyed by Killua, who threats to kill them if they try to cheat again. Then he fairly fights first against Killua in the Heaven Arena, and despite using his best attacks he is defeated by him, who blocks his whips, send him flying in the air and since the fall would be fatal to him Killua take him while holding Riehlvelt's electric whips, Riehlvelt then ends up electrocuted and fall on the floor defeated. After fighting Killua Riehlvelt fights also aganist Gon but since Gon knows already his attacks seeing his previous battle with Killua he is defeated very fast ending up elctrocuted again.

Combat
Riehlvelt fights using as his weapons two bullwhips with the shape of two snakes called "Twin Snake".

Riehlvelt rapidly agitates the two whips in all the area near him, making an defending himself and attacking the enemy if he come too close.
 * Twin Snakes' Song Of Defense

Riehlvelt uses his "Twin Snakes" to electrocute anyone who grabs them with 1,000,000 volts of electricity.
 * Thunder Snakes

Nen
Riehlvelt is an Emitter, so he is specialized on separating his aura from his body.

Trivia

 * In Nippon Animation's adaptation, Riehlvelt rides a scooter instead of a wheelchair and is not disabled.