Ta'varak

Kar Ta'varak was the leader of the Neo Ta'har movement. He was killed by Vance Vangelis for refusing to reveal Sefer's location.

We're Shinsengumi Lunatics!
Ta'varak was introduced in the short story We're Shinsengumi Lunatics!, where he met with Sefer Yetzirah in one of their fortresses. He told Sefer that the Neo Ta'har movement could not ally itself with the Shinsengumi, because the Shinsengumi possessed neither the size nor power in order to make it a fair deal. In response, Sefer summoned her Stand, Cruel Angel's Thesis, which awed Ta'varak and the other Ta'har present. After seeing a demonstration of CAT's power, Ta'varak agreed to ally with the Shinsengumi on the condition that each Lord of the Neo Ta'har would be allowed a Stand of their own. Sefer agreed, but also requested that she be given a title in the Neo Ta'har movement. Ta'varak nodded and told Sefer that they would discuss the full terms at a later date.

BZPB
Ta'varak later appeared in the main BZPB RPG, in a post set several weeks after the events of We're Shinsengumi Lunatics!. He was aboard the Neo Ta'har flagship Alvarak when Assassins Sans Frontieres stormed the ship and started massacring its crew. The heavily injured Ta'varak was confronted by Vance Vangelis, who quizzed him on the whereabouts of Sefer Yetzirah. When Ta'varak refused to talk, Vangelis shot him in the head, killing him instantly.

An inspection of the ship's computer by Highwater revealed that Ta'varak had scheduled a meeting with Sefer on the planet Geazo, so they decided to go there and set up an ambush for her.