Sayu is a Anemo element character, officially released on August 10, 2021 during the game's 35th character release. Originating from the region of Inazuma, she carries cultural and narrative influences from this place, which directly contribute to she personality and role within the story. In combat, Sayu uses a Claymore-type weapon, combined with a Loli body model — factors that influence both fighting style and the character's movement animations and dynamics. With a 4-star rarity, she main attribute is Elemental Mastery, which is essential for performance in advanced team compositions. Among she base stats, the character has 994 HP, 20 ATK, and 62 DEF — key values for assessing their potential from the early levels all the way to the endgame. Sayu's birthday is celebrated on October 19, a fun detail often appreciated by the community. Beyond the technical aspects, the character also features a rich and engaging backstory: "A pint-sized ninja attached to the Shuumatsuban, who always seems sleep-deprived.".