Kelrna was a Sith pureblood female Sith apprentice who served her master Darth Tomus during the Great Imperial War. She was a descendant of a legendary Sith Lord active during the Cold War and Second Galactic War. During the start of the Second Imperial War, Kelrna began her training on Korriban after her force-sensitivity was discovered. Kelrna studied under many Overseers who put her through several trials which Kelrna quickly passed. During a tour of the Sith Academy on Korriban, Darth Tomus learnt of her talent and made her his new apprentice.