

She didn't get to really have a childhood, and while the Chozo certainly protected and nurtured her, they didn't do it the way a human family would have. By the time she was a teen, Samus was a traumatized killing machine with no family and no friends. Those weird alien birds, the Chozo, then put her through rigorous warrior training, which wasn't really intended for humans. Her parents were taken from her by space pirates at young age, along with everybody else she knew and cared about in her colony, and she had to be raised by an ancient race of weird alien birds. See, it's important to remember Samus' childhood when discussing her relationship with the baby Metroid. But the loss of the infant Metroid hits her especially hard, as she not only feels a protective instinct towards it, but a type of kinship. every aspect of this character is defined by awful, awful things happening outside of her control.

She's traumatized from her childhood, her upbringing, her military service, her turn as a bounty hunter. Other M's is a narrative focused squarely on Samus' trauma. But when she intercepts a distress signal from a distant spacecraft, much like the signals that kicked of events of Metroid and Super Metroid, she's spurred into action and heads towards the source of the signal. She falls into a deep depression, and drifts without purpose for weeks. Samus is haunted by the death of a baby Metroid at the hands of Mother Brain, and carries a sense of guilt that she didn't do more to save it. Other M opens after the end of Super Metroid, with Zebes destroyed and the Chozo wiped out forever.
