Sally is an anthropomorphic chipmunk with brown fur, light cream markings, blue eyes and auburn hair. She wears blue boots and an open blue formal vest. In addition, she wears a white undershirt. For formal occasions, she wears a blue, sleeveless cocktail dress with blue high heels.
Sally was born into the Royal Family and was the heir to the throne. Becoming overwhelmed with these responsibilities left her isolated and sheltered from the outside. She befriended Sonic the Hedgehog during an arranged play date by Sonic's Uncle Chuck.
Following Dr. Robotnik's coup, Sally and the other children escaped Robotnik's force by fleeing to Knothole Village, but her father was imprisoned by Dr. Robotnik. While living in Knothole, Sally became one of the village's Freedom Fighters, serving as the group's strategist and de facto leader. She also became the surrogate aunt of Tails where she becomes overprotective of his safety. Over the next ten years, she and her friends then worked together to fight back and overthrow Robotnik's rule.
Sally is smart, confident, deliberate, and mature. She is likewise strong-minded, logical and focused, preferring to plan ahead of situations, while having a loving devotion to her people and friends. Her attitude stems from childhood due to a strict upbringing of learning etiquette, royal studies, and the family credo. Most of the time, she prides herself on her intellect and leadership skills. Whenever she feels stressed out, she consults Bunnie to balance her frustrations.
Sally's friendship with Sonic is a conflicting one, since Sonic antagonizes Sally due to her "slowness" while she tries to improve his mannerisms. Sonic was often an endless source of neuroses for Sally, who could be very sardonic and confrontational with his opportunistic, rebellious attitude, which contrasts her extremely meticulous and no-nonsense personality.
In spite of being a princess and proud of her title and heritage, Sally is very down-to-Earth and dislikes being treated any differently from the rest of her friends. She has a pride that rivals Sonic's on the field however, and can be ornery and easily flustered when conflicting with another. Ultimately though, she is only concerned for her team's well being and shows extra concern for Sonic.