Karoly D’ulin is a member of the Mistryl Shadow Guard and, with Shada D’ukal, one of the two women Timothy Zahn established as the real identities of the pair glimpsed in the Mos Eisley cantina in A New Hope. The retcon appears in his short story Hammertong: The Tale of the “Tonnika Sisters”, in the Bantam Spectra anthology Tales from the Mos Eisley Cantina (1995).
She serves on the six-person Shadow Guard team led by Manda D’ulin that is hired to protect a prototype component of the second Death Star’s superlaser, and reappears in Zahn’s later novels on the other side of Shada’s argument with the order. She is Star Wars Legends.
Catalogue entry. This figure has a verified record here rather than a full write-up — the encyclopedia labels its own depth instead of padding it.