Helena was a human who became immortal and lived on Earth for over 2000 years, all the while making an effort to protect Erimem whenever Erimem time travelled to whatever year Helena was living in at the time.
Roaming the Earth
Helena was in Alexandria when Cleopatra committed suicide in 1st century BC. When a Roman centurion attempted to stab Erimem from the behind outside Cleopatra's mausoleum, Helena silently slit the centurion's throat, killing him without Erimem noticing. (PROSE: The Last Pharaoh)
With Ibrahim Hadmani in the 21st century
Helena was also a fan of the Beatles. She thought that John Lennon was cute and that George Harrison was "sex on legs". In December 1964, Erimem and Andy Hansen bought Helena the Beatles albums Beatles for Sale and A Hard Day's Night as a Christmas present. (PROSE: In Search of Doctor X)
In an alternate timeline which was later averted by Erimem, Helena was captured by a fundamentalist cult in 2419. They tortured her, giving her the title "The Abomination", believing her to be a demon. (PROSE: The Three Faces of Helena)
In another alternative timeline, Helena was widowed a week into 2018 when Ibrahim was killed in a car accident. She joined Doctors Without Borders and kept in touch with Andy for only a year after. (PROSE: Auld Acquaintance)