Severin was a consummate comic book artist, engaged in most parts of illustrating a comic book, which involves penciling outlines of the characters and scenes, finalizing the images in ink and then coloring them in. She got her start in 1949 as a colorist for EC Comics.
Her career advanced in the 1960's, drawing characters for Marvel comics, including Daredevil, Iron Man, Captain America and often amended, retouched or updated other artists’ work.
Ms. Severin also designed the first Spider-Woman, drawing her with a skintight red-and-yellow costume. The character had her own comic book from the late 1970s until the early ’80s and has since been revived in different variations.
She worked at Marvel full time until the late 1990s, then drew as a freelancer and became a regular at comics conventions.
Ms. Severin’s brother died in 2012. She has no immediate survivors.