Sasami Kawai, an ordinary elementary school student, lives with parents running the music store CD Vision. While delivering a CD, she encounters Tsunami, a contender for queen of the magical realm Juraihelm, who selects Sasami as her earthly representative. This grants her a magical baton enabling transformation into the magical girl Pretty Sammy. Accompanied by Ryo-Ohki—a cabbit advisor who speaks and assumes human form—Sasami initially resists her role, fearing costume ridicule and identity exposure. Yet driven by responsibility and fierce protectiveness toward best friend Misao Amano, she consistently intervenes when others face danger. Unaware that Misao is forcibly transformed into the villainous Pixy Misa by Rumiya, brother of Tsunami's rival Ramia, Sasami repeatedly battles her closest friend. Cheerful, energetic, and kindhearted, Sasami displays childhood naivety and innocence, referring to herself in the third person in Japanese. Despite magical girl hesitations, she possesses strong justice and courage, confronting peril to shield strangers and loved ones. Excelling in dodgeball and video games while assisting with chores, she blends girly interests with tomboyish traits. Deep empathy and loyalty define her, particularly in safeguarding Misao even as Pixy Misa. This loyalty extends across storylines, including those featuring her protective bond with older brother Tenchi Kawai. As Pretty Sammy, Sasami gains athletic prowess rivaling top human athletes. Her magic baton facilitates transformation, spellcasting, and combat, upgraded in *Magical Project S* with the NT System against magic absorption. Signature spell "Pretty Mutation Magical Recall" alters her appearance and obscures identity, though acquaintances often deduce it. Her ultimate attack, "Pretty Coquettish Bomber," harnesses planetary-scale energy to defeat foes, combinable with Pixy Misa for "Pretty Sexy Coquettish Bomber." Other abilities include redirecting energy via "Pretty Home Run," summoning food with "Pipopa," OVA-exclusive powers like amplified "Hyper Sammy" attacks, "Pretty Heart Boomerang," a magic shield, and flight through "Pretty Wing." *Magical Project S* adds teleportation ("Pretty Teleport") and reality-warping "Pretty Space." The Bonus Theatre special "26 Secrets of Sammy" humorously lists inconsistent abilities like using pigtails as hands or her skirt as a blade. Across continuities, Sasami evolves: In OVAs, a Tokyo resident with no inherent powers, she gradually accepts her role despite embarrassment. *Magical Project S* deepens her growth as she masters complex spells, faces darker conflicts, and endures separation from Misao when Pixy Misa’s influence surges. A pivotal moment reveals classmates long recognized her identity but concealed it to spare her shame, bolstering her self-assurance. Bonus Theatre specials showcase fourth-wall-breaking humor, like her reactions to Ryo-Ohki’s absurd power listings in "26 Secrets," while a mock trailer teases future Mars missions with Pixy Misa. The spin-off *Sasami: Magical Girls Club* reimagines her as Sasami Iwakura, a fifth-grader with innate magic suppressed since age three. Here, she joins Washu Kozuka’s magic-training club, wielding gravity manipulation without Pretty Sammy’s persona or Juraihelm lore.