Symboli Rudolf, revered as the "Emperor," reigns as one of Japan's foremost horse girls. She serves as student council president at Tracen Academy and is a core member of Team Rigil. Her leadership prioritizes fairness and vigorously upholding the school's image. Despite a strict and authoritative exterior, she holds genuine concern for newly enrolled students and a protective instinct towards them. She sports long, light brown hair reaching her waist, darker at the front with a distinctive white streak swept left. Her magenta eyes possess a soft yet penetrating gaze. A silver earring featuring a thin jade stone adorns her right ear. Her attire reflects her status: a dark green military-style jacket displays medals representing seven major race victories, paired with a red cape, intricate gold patterns on sleeves and tights, and a custom belt bearing a silver centerpiece signifying her lineage. Her personality blends wisdom, calmness, and a strong sense of duty. She excels at strategic games like chess and maintains a formal demeanor in interactions, often struggling with casual exchanges. A lesser-known facet is her fondness for puns and gags, though her delivery often falters, a trait appreciated only by individuals like Nice Nature. She possesses an exceptional memory for faces and finds secret satisfaction in perfectly aligning stamps during paperwork. Relationships are significant to her background. She shares a close bond with Tokai Teio, who deeply admires her, mirroring their real-life counterpart connection where Rudolf is Teio's sire. Within Team Rigil and the student council, she collaborates with Air Groove, Narita Brian, and Maruzensky. Her primary rivals include Mr. C.B., another Triple Crown winner, and Katsuragi Ace, who famously defeated her in a historic Japan Cup. Her racing legacy is legendary. She achieved the Classic Triple Crown (Satsuki Shō, Japanese Derby, Kikuka Shō) undefeated, becoming Japan's fourth Triple Crown winner. She set a record by winning seven Grade 1 races, earning the title "Seven Crown Horse," though this record was later surpassed. Her three career defeats are widely remembered for their dramatic circumstances, including narrow losses and an injury during an international race that led to her retirement. Beyond racing, she advocates for a world where all horse girls can thrive, driven by a vision of collective happiness. Her real-life counterpart inspired commercial tributes, including the sake "Nanakanba" (Seven-Crown Horse), which later featured a collaboration with her character.