andromeda was introduced in "the defenders" #143 (march 1985) and added to the titular supergroup's lineup just a few issues later. writer peter b. gillis later revealed, "my long-term plan was to populate the defenders with my own crew of characters, characters who nonetheless had ties to interesting parts of the marvel universe. andromeda, while not the sub-mariner, gave me a connection to atlantis." however, andromeda would be the last character gillis added to the defenders, since shortly after her debut he was told that the series was being cancelled.