Rachel is a recurring human character in the Sonic the Hedgehog film series, including the third installment. She is the older sister of Maddie Wachowski and the mother of Jojo, and she lives in the suburbs of San Francisco. Her family ties place her at the edges of the extraordinary events involving the hedgehogs and their allies, and she stands out as one of the few ordinary human figures within that unusual world.

In terms of personality, Rachel is straightforward, outspoken, and no-nonsense. She has little patience for evasions and strongly dislikes being lied to, preferring that problems be handled through proper legal channels; when her brother-in-law Tom Wachowski appeared to be wanted by the authorities, she did not hesitate to threaten to involve the police. She is quick with sarcastic remarks and expresses her opinions bluntly, particularly about Tom, whom she initially disapproves of and frequently criticizes, feeling that her sister could have made a better choice. Beneath this sharp exterior, however, Rachel is deeply loyal and protective of her family. Her critical attitude stems from genuine concern for her younger sister's happiness, and her devotion to her daughter is unmistakable.

Rachel's motivations center on caring for the people she loves and on a desire for honesty and order in her life. She values keeping her family together and is wary of anything or anyone who seems unreliable or dangerous. This drives her early resistance to Tom and later fuels her strong reaction when she discovers that Randall, the man she married, has been hiding his true identity as an agent of the Guardian Units of Nations, or G.U.N.

In the story, Rachel provides a grounded, ordinary perspective on the chaos around her. She is introduced as Maddie's sister in San Francisco, skeptical of the life Maddie and Tom have built. In the second film, her wedding becomes the setting for a major confrontation, and she learns that Randall is an undercover agent. Her sense of betrayal is genuine, yet she eventually reconciles with him, demonstrating a capacity for forgiveness once trust is rebuilt. By the third film, Rachel and Randall are married and expecting a child, and the couple is drawn into the larger conflict involving Shadow and the Robotniks. Her pregnancy does not remove her from events; she remains engaged and unwilling to be sidelined, and her home becomes part of the mission when her sister Maddie adopts Rachel's appearance using a special device in order to infiltrate G.U.N. headquarters.

Her key relationships define much of her character arc. With Maddie, she shares a close, teasing sibling bond, and she is not shy about criticizing her sister's choices even as she loves her deeply. With Tom, she moves from suspicion and disrespect toward reluctant acceptance, eventually recognizing his loyalty while still giving him a hard time. With Jojo, she is a devoted and protective mother. With Randall, her journey is the most dramatic: his deception wounds her, but she chooses to rebuild their relationship and start a family with him.

Over the course of the films, Rachel develops from a skeptical, judgmental outsider into a brave and more accepting member of the family. Her earlier dismissiveness toward Tom softens as she witnesses his goodness, and her experience with Randall teaches her that people are often more complicated than they first appear. When her family is threatened, her courage surfaces, and she proves willing to face situations far beyond everyday life.

Rachel has no superhuman abilities. Her strengths lie in her sharp instincts, quick thinking, blunt honesty, and fierce determination. She is capable of holding her ground under pressure and refuses to be a passive figure even when circumstances place her in harm's way, making her a capable and memorable presence within the series.