Sally is a rogue mage originally affiliated with the Eye of the Midnight Sun, joining them to pursue experimental research free from the Clover Kingdom's Magic Knights restrictions. She possesses disheveled medium-length black hair, red eyes, and wears black-framed glasses. Her typical attire includes a maroon crop top, mini shorts, and knee-high boots, often covered by the organization's white hooded robe. After allying with the Black Bulls, she adopts a practical white sleeveless tunic and light-colored shorts. Her personality centers on intense scientific curiosity and a disregard for conventional modesty or ethical limits. She exhibits fascination with unique magical phenomena like Anti Magic, Transmutation Magic, Thread Magic, and Dream Magic, openly expressing dissection desires or experimental urges towards individuals possessing such abilities. This obsession drives actions like capturing Asta for study and enhancing allies such as Baro with unstable dark magic tools that transform him into a mud monster, which she dismisses as a failure. Her unhinged enthusiasm persists even after facing mortal danger, though her methods shift following a pivotal agreement with Asta. Sally participates in major conflicts for the Eye of the Midnight Sun. She facilitates Asta's abduction during the Royal Capital assault, deploying her Sticky Salamander gel magic to counter attacks and enable escapes. Later, she attacks the Black Bulls base alongside Rades Spirito and Valtos, using an enlarged Huge Sticky Salamander enhanced by a Magic Scorpion tool to destabilize the structure. Grey's transmutation of the gel into crystal allows Gordon Agrippa to destroy it with Poison Magic, defeating her group. Patolli, the organization's leader, later betrays Sally, revealing her group's intended role as sacrifices for the elves' reincarnation. As her body disintegrates, she pleads futilely before her mana is fully extracted. Rades resurrects her using Soul Abductor magic to seek revenge against Patolli. Teleporting to the Black Bulls base, Sally negotiates an alliance: Asta offers his body for non-painful experiments in exchange for her aid defending the kingdom, with the conditions that her research must benefit others and avoid causing harm. Post-alliance, Sally aids the Clover Kingdom's defense during the elf invasion. She counters Rossa's Sandstone Magic and collaborates with Luck Voltia and Magna Swing in Reve's Glamour World, devising tactics exploiting the dream environment's rules. She later assists in repairing the kingdom and joins the Magic Tool Research Lab under Makusa North, developing tools for the Spade Kingdom invasion. During that invasion, she evacuates citizens from devils using her gel magic while testing tools derived from studying Asta's Anti Magic. In the spin-off "Mugyutto! Black Clover," Sally orchestrates a scheme transforming multiple Magic Knights—Magna Swing, Luck Voltia, Charmy Pappitson, Finral Roulacase, Vanessa Enoteca, Gauche Adlai, Noelle Silva, and Grey—into robots. She poses as a fortuneteller to deceive Noelle and impersonates Gauche's sister Marie to trick him. Her plan combines the robots into a Black Bull mecha and awakens a giant demon skeleton to attack the Royal Capital. She reveals her intent to dissect Asta and convert him into a robot, though he ultimately merges with the mecha to counter the demon threat. Despite her alliance shift, Sally remains under constant Magic Knights surveillance due to her past actions and perceived lack of morality. Her research continues within defined ethical constraints, focusing on defensive applications and magic tool development for the kingdom's benefit.