Paul Alvarez (Earth-616)
Paul Alvarez saw his sister Mary Elizabeth Alvarez walk through a portal when they were children and never set eyes on her again. As an adult, Paul became convinced that Huntara was his long lost sister. Huntara was raised by Warlord Kargul in another dimension called Elsewhen and was supposedly the half-sister of Reed Richards via their father Nathaniel. Kargul did use portals so it was somewhat plausible. Huntara refused to believe Paul's story and was adamant that she was not his sister. It was implied that Fantastic Force villain Zarathustra who had been raised by Lord Moses may in fact be Mary Elizabeth Alvarez.