Rynscar, a Black Sun Underboss, existed during the concluding years of the Galactic Empire's reign. During 5 ABY, while Jas Emari, a Zabrak bounty hunter, and her New Republic boyfriend, Jom Barell, were on Nar Shaddaa looking for details regarding Han Solo's location, Rynscar launched a surprise attack on them. Jas successfully persuaded Rynscar to forgo handing her over to Gyuti, her Boss, by promising to settle her debts at three times the original sum. Subsequently, Rynscar notified Mercurial Swift, another bounty hunter, that Gyuti had placed a bounty on Jas Emari.