Cordelia Frost

Cordelia Frost stepped onto the Marvel stage in 1995's Generation X #8, courtesy of Scott Lobdell and Roger Cruz, arriving as part of the famously complicated Frost family — a clan whose pages she shares with Emma, Adrienne, Winston, Hazel, and Christian Frost. Her appearances span an impressive eighteen years across titles like Generation X, Emma Frost, and Wolverine & the X-Men, making her a quietly persistent thread woven through some of Marvel's most compelling mutant storytelling. She may not boast a towering appearance count, but any character who keeps company with Emma Frost and endures across nearly two decades of the Modern Age clearly has a hold on the Marvel universe worth investigating.