Shizu Ito commands the Schwarz-Grail legion at Yurigaoka Girls Academy and ranks among the esteemed first-year "Three Princesses." Her combat tactics revolve around "illusionism," weaving phantom-like movements into methodical strategies for decisive effect. This unique skill, paired with formidable strength and unflappable judgment, cemented her moniker: the "Ice Emperor."

Born into a powerful financial conglomerate, Shizu navigated a complex family environment that sparked disturbances during her middle school years. She shares a bond with her younger sister, Naehi Ito, who holds deep admiration for her; despite this, Naehi remains emotionally distant. Originally drawn to freelance combat, Shizu found inspiration in Team Hitotsuyanagi, prompting her to shift focus and establish her own legion.

Physically, Shizu possesses long blue hair reaching her hips and striking violet eyes. Her birthday is April 2. Beyond her core role, background, and established traits, her narrative remains defined by these elements.