Mikako Satsukitane holds the position of student council president at Sorami Academy. She perpetually wears a sadistic grin, especially when targeting Tomoki Sakurai, whom she manipulates through perverted schemes for personal amusement, treating him as a plaything. Her appearance features long purple hair secured by two ribbons at her sideburns, narrow dark-purple eyes, and a tall, curvaceous frame standing 164 cm tall, weighing 46 kg, with measurements of 83-56-80. She typically dons the Sorami Academy uniform. As heir to Sorami City's influential yakuza family, her immense wealth funds extravagant events like tournaments and festivals. Her criminal ties provide access to weaponry, including guns and military vehicles. Childhood friend Sugata Eishirou—whom she calls "Ei-kun"—references her family's misappropriation of national funds, earning her the moniker "Black Money" during a wealth contest. Despite her sadistic tendencies, she displays generosity by sharing resources with friends. Mikako exhibits extraordinary physical strength, including a 400 kg grip strength noted by Nymph and combat skills rivaling Sugata's. She possesses extreme luck, exemplified by unearthing gold and oil while digging. Her strategic intellect enables complex schemes and hacking, though she failed moral education classes in the manga, requiring supplementary lessons. Romantic tension defines her relationship with Sugata, marked by jealousy and violent reactions to perceived betrayal. In *Yūryō Bukken Mō Dame Sō*, she threatens him with a gun upon learning of his past ties to Archangel Charon. In *Daisuki desu!! Mahou Tenshi Cosmos*, she punishes his "cheating" by shooting him from afar. She occasionally supports others, funding dangerous tournaments or showing concern for Ikaros' emotional growth—once ordering Ikaros to drop Tomoki into the sea to provoke a confession. Hints of an angelic origin surface in *Eternal My Master*, where Ikaros' memories depict Mikako with wings, suggesting Synapse ties. Sugata's inquiry about her "real birthday" in the manga epilogue further implies a hidden identity, which she evades. Her abilities, like hacking and anomalous luck, mirror Synapse residents' traits. Later, in *Dame Sō*, Mikako encounters Sugata's brother Yuugo, pledging aid against an Angeloid before Sugata intervenes. She also employs the Angeloid Oregano as a maid and enforcer in the manga.