Samuel's daughter and an ATS member. She rescues May from a bombed orphanage and takes her in. In the altered timeline, Tom's asthma medication saves her life, allowing her to live until 1992 and become May's lifelong guardian.
Alison transitions from rescuer to lifelong guardian, providing May with stability and care.
Susan serves as the domestic staff member within the Wheeler household.
Tom's medical intervention directly saves Alison's life, altering the historical outcome.
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