Green Wantan is an esper that was imprisoned and forced to fight in the "Esper Underground Arena".
He appears identically to Green Lantern.
Not much is known about his personality. He was just a good guy.
Along with his girlfriend, he was captured by the Esper hunter, Nadja Koroshinskii, and was brought to the Esper Underground Arena in Hong Kong. He was forced to hide his true identity and fight against other fighters. In the end, he was able to rescue his girlfriend, thanks to Rinka Urushiba, Kyotaro Azuma, and the CIA.
Cryokinesis: He shares the same ability as Ren Jomaku, Cryokinesis. He is able to manipulate ice and create a lot of ice blocks.