Roscoe Ruskin

 was a jazz player on the Roscoe Ruskin and the Storyville Players. He developed a romantic relationship with Cindy Wu. He was possessed by King Nocturne on the Red Note. (COMIC: The Jazz Monster)

He sacrificed himself to kill King Nocturne. (COMIC: Music Man)

In a parallel universe, he survived and became a jazz legend. Dorothy Bell managed to pull one of his records through from the parallel reality and gave it to Cindy. (COMIC: Old Girl)

Legacy
When discussing Cindy's feelings for her, Gabby would bring up the relationship that she had shared with Roscoe, going on to say that Cindy needed to learn to be less dependent emotionally on the people she loved. (COMIC: Old Girl)