Lygrass was a werewolf sailor mentioned in Death at Sea.
After visiting an insane sailor, Sliske tracked down Lygrass, the last surviving member of the Glory of Zaros, who was drinking in a bar by himself. Sliske interrogated him about what happened aboard the Glory, but he was reluctant to give answers. When asked about Xau-Tak, Lygrass started singing a song that resulted in a bar fight, during which he was killed.