Nei Rin was a Yuuzhan Vong Master Shaper. She was entrusted by Kol Skywalker to lead the Ossus Project, and kept a coral craft beneath the Jedi temple. When the project went wrong, however, she investigated and discovered that the effort had been sabotaged by the New Sith Order. By the time she arrived back on Ossus with her findings, however, it was too late-the Massacre had taken place and half the New Jedi Order was dead, with the rest scattered and in hiding. She and her guards gathered up what Jedi artifacts hadn't been looted by pirates and safeguarded them in a repository under the temple. She remained on Ossus after the Jedi temple was attacked. Among the dead were Kol Skywalker, the body of whom she cremated in a Jedi funeral.
Because she was partners with Kol Skywalker on the Ossus Project, Nei Rin felt indebted to his son, Cade Skywalker. Upon Cade's second departure from Ossus, she gave him his father's lightsaber, which contained a lambent crystal of her shaping.