Vil Kothos was a male Human Dark Jedi and a prominent member within the Disciples of Ragnos cult, holding a position of significant authority.
He, alongside his twin brother Dasariah, were famously known as the "Kothos Twins" or alternatively, the "Reborn Twins." These twins achieved iconic status within the cult and posed a formidable challenge to any Jedi they encountered. Unlike the majority of the New Reborn under Tavion Axmis's command, Vil eschewed the use of lightsabers, instead relying on his extraordinary command over the dark side of the Force coupled with Force-augmented acrobatic maneuvers.
Both twins were regarded as experts in the dark side of the Force, potentially even exceeding Tavion's dark side prowess, as she prioritized lightsaber combat techniques.
Vil Kothos was distinguished by his orange combat attire and a remarkably deep, almost inhuman voice that instilled fear in many sentient beings.
The twins accompanied Tavion Axmis to the Massassi Temple located on Yavin 4, where she extracted Force energy from the temple utilizing the Scepter of Ragnos. Subsequently, they provided assistance to Rosh Penin during his duel with Jaden Korr within the Bast Castle situated on Vjun, amplifying Penin's abilities through the Force. Korr determined that his only chance of victory against Penin lay in first defeating the twins while simultaneously defending against Penin's attacks. The twins exerted their full power to prevent Korr from harming Rosh.
Despite their considerable power in the Force, Korr ultimately defeated and killed both twins before proceeding to defeat Penin. Their acrobatic skills and Force mastery notwithstanding, reliance on the dark side alone proved insufficient to overcome Jaden Korr, resulting in the twins' demise on the cold floor of Bast Castle, consumed by the dark side of the Force.