Demiqas

Demiqas (real name: Kazuto Kumada) is the first major antagonist in the light novel and anime series Log Horizon. He is a veteran player of Elder Tales and the leader of Brigandia. Shiroe and his group encounter him in Susukino, which they travelled to in an attempt to rescue Serara, a member of the Crescent Moon Alliance, who Demiqas captured but was rescued by Nyanta. He is a Lv.90 Monk-Outlaw.

He is voiced by Atsushi Imaroka in the Japanese version of the anime and Rob Mungle in the English version, the latter of whom also voices Zank.

About
Demiqas's true identity is Kazuto Kumada, a 19-year-old high school graduate. He is the leader of Brigandia, a guild that had its fair share of notoriety even before the Apocalypse and which rules over Susukino. After the Apocalypse, they start running Susukino with a tyrannical iron fist, PKing anyone who dared leave the city, disagree with its members, or otherwise oppose their rule. Its members kidnapped both People of the Land and Adventurers, especially females, in order to sell them to slavery or rape them. One of these people was Serara, who was in Susukino at the point of the Apocalypse, and so ended up trapped there. However, she was rescued by former Debauchery Tea Party member Nyanta, who hid her away and took care of her.

Disgusted by Nyanta's defiance, Demiqas started a pursuit over the entire area to track down and recapture Serara. It is around this point that Shiroe arrived with his friends Naotsugu and Akatsuki, after which they met up with Nyanta and Serara. The group eventually face off against Brigandia. It's five players versus an entire guild, but eventually they are able to defeat them, with Serara delivering the final blow to Demiquas- a truly karmic defeat considering what he had done to her.