Nikora

Nikora was one of three Klingon brothers who served as Matan's top lieutenants among the Solarii in the early 25th Century. (Star Trek Online: Valkyries)

Origins
Nikora and his brothers crashed on the planet Yamatai in the Dragon's Head Nebula in 2386. Nikora was the youngest of the three brothers. Matan privately described them in his logs as "broken in the storms" and "strong of body and weak of will." He rescued them and they became the founding members of the Solarii Brotherhood. They also became the second-highest leadership in the cult after Matan himself. Among their privileges was the right to keep and use modern weapons without special permission from Matan. Nikora carried a handheld photon grenade launcher, and was known to use it on members of the Solarii Brotherhood who displeased him.

Death
In 2407, Nikora's oldest brother Vamdar was killed by Lieutenant Carlin Agran in self-defense. Thereafter he became obsessed with exacting revenge on Carlin. He worked with Brother John Briar to restore Solarii communications after their communications base was attacked by Starfleet crash survivors. Thereafter he and his brother Durtlhor captured Carlin when she tried to save her friend Lieutenant Sam Hayashi from being burned alive in the Solarii Ritual of Fire. Durtlhor and Nikora beat Carlin mercilessly, then dragged her into a nearby cave. Durtlhor argued that the should take Carlin to the site of their brother's death to execute her, but Nikora wanted to kill her on the spot and challenged Durtlhor's plan as cowardly. In the ensuing fight, Carlin fell into a chasm and escaped into the Pit. Nikora said she could not have survived, but at his brother's insistence had a search party sent down into the Pit to find her. Nikora himself, refused to go, however.

Later, when Carlin and Sam set off a series of verdenicine gas explosions in the Solarii compound and began to escape, Nikora attempted to kill them using a plasma minigun emplacement. However, his narrow focus on avenging his brother's death caused him to target only Carlin and ignore Sam. Sam was able to use this to outflank his emplacement, destroying the plasma minigun and stealing his photon grenade launcher. She used the launcher's last shot to kill Nikora. He was the last of his brothers to be killed by the Starfleet crash survivors. ("Survivors of Yamatai")