Carth Onasi is a secondary character in the Knights of the Old Republic video game series and a minor character in the comic book series of the same name.
Carth was a soldier and pilot loyal to the Republic. During the Mandalorian Wars, he served under Admiral Saul Karath whom he considered to be his mentor. At one point, he encountered a Jedi named Zayne Carrick who was wrongly pursued. Onasi thought the boy was a lunatic until he demonstrated his Force abilities to him. After Revan killed Mandalore the Ultimate, the war ended and Carth plans to reunite with his family on Telos.
Unfortunately the two war heroes Revan and Malak turned to the dark side and declared war on the Republic Admiral Karath joined the two Sith Lords and bombed Telos as proof of his loyalty. Carth was distraught at his mentor's betrayal and Telos' fate. He later discovered that his wife was dead and his son went missing. This experience made Carth to realize that he cannot trust anyone again.