Phin-Law Wo was a Jedi Master of the Jedi Order who had an assignment at the Jedi Temple located on the planet of Vrogas Vas. Wo created recordings of his wisdom in a Jedi holocron, giving instruction that it should be defended no matter what. By 0 ABY, the holocron was acquired by Grakkus the Hutt, a crime lord whose base of operations was on the moon Nar Shaddaa. In that year, Grakkus took the Force-sensitive rebel Luke Skywalker as a prisoner and demanded that he unlock the holocron, threatening Skywalker with death if he refused. Skywalker succeeded in opening it, and Wo's hologram manifested itself in the room. As a member of the Jedi, Wo was dressed in Jedi robes.
The hologram of Phin-Law Wo made an appearance in the ninth issue of the Star Wars comic-book series from 2015. The comic was penned by Jason Aaron, with illustrations by Stuart Immonen, and was released by Marvel Comics on September 16, 2015.