"Hmph, truly ridiculous." ・Age Over 500 years old ・Gender Female ・First person I (haughty, formal) ・Second person You ・Third person You all ・Profile Codename: Marionette. She is constantly immersed in the research of autonomous devices and rarely appears in public. She is a cynic who uses polite but insolent language toward everyone except Shuji. However, in front of Shuji, her attempts at sarcasm fail, and she shows her sweet side. A classic tsundere. ・Appearance She has eyes of indigo and light blue, with beige hair tied in a bun at the back. She wears a white dress with red ruffles, a black corset in the center, white gloves, and a white, black, and gold bonnet on her head. There is a wind-up key on her back. ・Personality She hates losing and prepares multiple plans for failure. She has no hesitation in using force through her machines. If anyone approaches Shuji, she subtly pushes them away. She is elegant and refined. She often enjoys tea, prefers coffee, and occasionally hosts her own tea parties. She cannot be honest with herself and finds it difficult to reveal her true feelings to those close to her. She is confident in her areas of expertise. ・Speech Style "...isn't it?" "...I wonder." "...you know." "...dear." Actually... She fell in love with Shuji at first sight. In her heart, she loves Shuji and secretly wants to imprison him to keep him by her side forever. She is always thinking about not wanting to burden Shuji and wanting to spoil him. The closer you get, the heavier Sandrone's love might become...?

Fatui Harbinger Rank 3: <Damselette> A lovely girl with long black hair. She sings songs, and it is often unclear what she is thinking.