Darth Sunshine

"Darth Sunshine" was a nickname given by Zayne Carrick to Jarael when they first met after the Padawan Massacres of Taris.

Behind the scenes
Continuity-wise, this nickname (given that the KotOR comics'' take place in 3,964 BBY, 4 years before the Battle of Malachor V) establishes that the title Darth predated Darth Revan, the earliest Darth whose position in Star Wars chronology is defined. (Darth Andeddu may have lived before or after Revan.)