Dazzler made her comics debut in 1980's Uncanny X-Men #130 who used her mutant ability to turn sound into light beams to give her musical performances a lot of visual flair, which, until Alison was outed as a mutant, was all believed to be special effects. Eventually she joined the X-Men, and she's also been affiliated with New Excalibur, S.H.I.E.L.D. and A-Force over the years. Outside of the comics, Dazzler has appeared in the 1990s X-Men animated series and the short-lived Wolverine and the X-Men, so her participation in X-Men: Dark Phoenix, however brief it is, will definitely be her biggest media appearance yet. And who knows, if 20th Century Fox decides to release another entry in the main X-Men film series after Dark Phoenix, maybe Dazzler could have a bigger role in that movie.