Minami Senju is a third-year Ouri High School student actively restoring otaku culture in future Akihabara. She measures 168 cm tall, weighs 57 kg, and has body statistics of 90/59/87. Born on August 25 with blood type A, she consistently wears a headband and sports long rapunzel-style hair.

Raised in rural Kyoto, her speech carries a distinct regional dialect. Minami displays a kind, homely demeanor, frequently assuming a motherly role among peers while rarely exhibiting seriousness or anger. Her hobbies center on training simulation games, and she deeply dislikes broken promises. Exceptionally skilled in housekeeping, she excels at cooking and domestic tasks, prioritizing health, beauty rituals, and onsen visits.

When confronting memory-eating viruses endangering fictional worlds, Minami wields a scythe as her weapon. Despite a timid streak, she upholds a resolute sense of justice. Her given name translates to "south sea" (南 meaning "south," 海 meaning "sea"), and her surname Senju combines "thousand" (千) with "dwelling" (住).