Mar-Da, a Voss Mystic of the male gender (male), resided on the planet Voss in the distant past, well before the outbreak of the Galactic War. This individual uncovered a perilous Forbidden Ritual, and following his demise, his spirit lingered within the Shrine of Healing, acting as a guardian of the shrine's concealed knowledge.
When Lord Kallig sought to acquire the ritual with the intent of dominating the spirits they had subjugated, Mar-Da commanded them to retreat, emphasizing the ritual's prohibited nature. Despite this warning, the youthful Sith utilized their abilities to ensnare him, compelling him to divulge the specifics of the ritual.
Mar-Da is a character featured in Star Wars: The Old Republic during the Sith Inquisitor's storyline on Voss. The player has the choice of either binding Mar-Da, resulting in dark-side alignment points, or employing the Force to convince him to disclose the ritual's details. If the player chooses to bind him, they are subsequently presented with the option to either set him free or maintain his confinement, neither of which influences the player's alignment. Given that Kallig is an Imperial character, it's generally accepted that the player selected all the dark side choices.