10 Comic Characters Who Actually Stayed Dead
9. Crimson Fox
Crimson Fox was actually two heroes, both of whom have stayed dead.
The identity was actually shared by the D'Aramis sisters, a pair of Parisian identical twins. After faking Constance's death, they took turns swapping identities, one as the superhero Crimson Fox, the other as head of their perfume company. As Crimson Fox they both had enhanced speed and agility and the power to control pheromones.
Crimson Fox joined the Justice League of Europe and the sisters confused their teammates with their constant swapping. This was pretty conclusively resolved in Justice League International #104, when Vivian was killed battling against the French supervillain Puanteur.
It was even more conclusively solved in Starman #38 when Constance (now the sole Crimson Fox) joined a new version of the Justice League of Europe. Her teammate Ice Maiden was actually the villain Mist in disguise and used the element of surprise to slit Constance's throat.
Both sisters have remained dead since then. However, a new Crimson Fox did briefly appear as part of the international superteam the Global Guardians. This Crimson Fox's identity was never revealed, but she claimed to be the heir to the D'Aramis fortune.