Jenny Everywhere's mother
Jenny Everywhere's mother was a mysterious woman who was a famous aeroplane pilot until she disappeared. Jenny Everywhere retained her goggles and scarf, duplicated across the multiverse to infinity alongside Jenny herself.
Biography
Jenny Everywhere once noted that her mother had been a famous pilot until she disappeared. (COMIC: The Late Shift)
According to Jenny Everywhere: Secret Origins, a comic book, Jenny's mother was a woman with light blue-green eyes and reddish-brown hair. She often wore over her head the scarf which her daughter would later inherit from her and wear around her neck. Still according to the comic book, she climbed to a high rank in the military hierarchy of "the oldest and most advanced Earth" in the multiverse and married a scientist who was himself held in high regard, although not quite as much as her. (COMIC: The Secret Origin of Jenny Everywhere)
She had two daughters: one, the elder, being the one who would one day call herself Jenny Nowhere, and the other, younger, being Jenny Everywhere. Jenny Everywhere later remembered eating toast for the first time in their mother's kitchen while she was six years old. (PROSE: Memories of Nowhere)
Jenny Everywhere: Secret Origins recounted that Jenny's mother was one of the only individuals to believe her husband, a scientist, when he discovered that a mysterious, intelligent force of destruction was eating away at the multiverse and might soon destroy their universe. She helped him place their young daughter, barely more than a baby, in the Pod he had constructed, which would allow her to survive the destruction of her home Earth at the cost of splintering her across the multiverse. Shortly after, the dark force consumed the home universe, Jenny's mother included. (COMIC: The Secret Origin of Jenny Everywhere)
However, Jenny Everywhere later visited her mother's now-empty kitchen for the first time in "centuries", showing that this account was unreliable and Jenny's childhood homeworld was not in fact permanently destroyed. (PROSE: Memories of Nowhere) Indeed, when Retro asked Jenny if the tale related by Jenny Everywhere: Secret Origins was really how it had happened, she evasively answered "Eh… kinda". (COMIC: The Secret Origin of Jenny Everywhere)
Behind the scenes
The intended implication of the description of Jenny's mother in COMIC: The Late Shift as "a famous pilot who disappeared", and was known for wearing goggles and a scarf, is that Jenny's mother was somehow Amelia Earhart or a parallel universe version thereof.
Because "Jenny Everywhere's mother," on the face of it, is an extremely vague concept defined by her relationship to an open source character, the broad idea of "Jenny Everywhere's mother" can be considered an open-source character, although the visualisation of her in COMIC: The Secret Origin of Jenny Everywhere is not open-source.