Rosh Penin

Rosh Penin was a Jedi student at the Jedi Praxaeum (the Jedi Academy of Luke Skywalker) after the fall of the Empire. Rosh befriended Jaden Korr, and after their trasport's shooting down, the two new friends were forced to fight his way to the Jedi Academy through Howlers and a few Stormtroopers.

Rosh ended up under Kyle's tutelage, just like Jaden.

It turned out the Stormtroopers and the Cultist were actually part of the Disciples of Ragnos who were on the planet with Tavion and Alora, stealing information from the Academy.

They worked their way through missions, but on one of them Rosh was captured by the Disciples of Ragnoss. At first Rosh thought he would be killed, but instead they converted him and he became an apprentice to Tavion, leader of the Disciples of Ragnos.

On Vjun with Tavion and the Reborn Twins, Rosh was helping the operations in Bast Castle (Darth Vader's personal fortress) where Force Energies were absorbed with the Scepter of Ragnos. Kyle Katarn and Jaden Korr interrupted the operation. After killing the Reborn Twins and nearly killing Rosh, Kyle walked in. Jaden and Kyle were soon both on the verge of death as Tavion revealed herself, and used the Scepter of Ragnos to nearly kill Kyle.

Luckily Jaden got Kyle and himself out of the sitiuation and they escaped.

Some time later Rosh repented and tried to turn from the Dark Side while on Taspir with Alora, Tavion's other apprentice. Rosh sent a distress message to the Jedi Academy. Alora found out. Jaden arrived on Taspir found Rosh, and killed Alora.

Rosh in the process lost his arm but it was replaced with a mechanical one.