Fen

Fen is an Atlantean princess and the mother of Namor the Sub-Mariner. Her union with a human sea captain produced Namor, whose half-human, half-Atlantean nature defines his identity and powers as Marvel's first mutant and ruler of the undersea kingdom.

Fen made her Marvel debut in Young Men #24 in 1953, brought to life by the formidable creative team of Hank Chapman, Russ Heath, and Carl Burgos during the twilight of the Golden Age — a pedigree that places her among the earliest threads of Marvel's mythic tapestry. With just 12 catalogued appearances, she's a rare and selective presence, yet the company she keeps is extraordinary: her pages are shared with legends like Namor, the Human Torch, Captain America, and Reed Richards. Her appearances across Namor, Fantastic Four Annual, and Essential Sub-Mariner collections span an remarkable seven decades, and at least one of those issues carries key-issue status for discerning collectors. For fans who love digging into Marvel's deep waters, Fen is exactly the kind of elusive, historically rooted figure who rewards the search.