Comrade X
Comrade X (Nina Vladimirovna Tsiolkovsky, Marvel) appears in 4 issues in grailworth's catalog, and was first published in 1962. First appearance: Tales to Astonish #36 (1959), cover dated 1962.
First appearance
Every appearance we value
Marvel Super-Heroes (1967) 1 issue
Tales to Astonish (1959) 1 issue
West Coast Avengers (1985) 1 issue
Character appearances from the Grand Comics Database, CC BY-SA 4.0.