Rumiho Akiha, better known as Faris Nyannyan, hails from a wealthy family whose influence is etched into Akihabara's very name. A defining childhood trauma occurred at age eight when, blaming her father for neglecting her birthday, she wished for his death during an argument. He took an early flight that crashed, killing him. This left her burdened with lasting guilt over their final exchange. Carrying unresolved grief, she later established her dream maid café, MayQueen NyanNyan. Faris displays long pink hair, often in twin braids or pigtails, and pink eyes. Her signature attire is a complete maid uniform with headdress, apron, ribbon necktie, black leggings, and shoes, frequently accessorized with cat ears and a wristband. Her casual wear includes an amber dress and a black tiara. Depictions of her physical traits, particularly bust size, vary across media. Her personality functions through distinct layers. Publicly, she embodies the playful "Faris Nyannyan" persona: a cat-themed maid who punctuates speech with "nya" (meow) and exhibits exaggerated moe mannerisms. This facade conceals her true self, Rumiho—a lonely and perceptive individual shaped by abandonment fears stemming from her mother's frequent absences and a lack of childhood confidants. Privately, she reveals intelligence, emotional perceptiveness, and occasional manipulation, such as orchestrating scenarios to involve Okabe. Her "Cheshire Break" ability enables her to detect lies and hidden motives by reading subtle cues in expressions and gestures. Her development unfolds across world lines and spin-offs. In the Alpha attractor field, her father's death defines her grief and ownership of the café. In Beta world lines, her father survives, allowing her to pursue competitive gaming in RaiNet AccessBattlers tournaments, where she mentors Okabe and Mayuri after defeating them. Significant growth occurs in *Linear Bounded Phenogram*, set in a dystopian future. Here, she helps Nae Tennouji process trauma by advising that "scars become scabs where flowers bloom." She demonstrates maturity by accepting that white lies and discretion are necessary components of trust in relationships, moving beyond her fear of deception. Relationships showcase her selective vulnerability. She trusts Future Gadget Lab members enough to reveal her true identity, Rumiho, and collaborates on experiments, including sending a D-Mail to undo her father's death. She shares a unique rapport with Okabe, humoring his "Hououin Kyouma" persona and co-creating delusional scenarios, though she often escalates them past his expectations. Her butler, Kuroki, remains a lifelong confidant, while her mother's absence reinforces her independence and isolation. Trivia notes her self-proclaimed origin from the "Chinchilla Star," her designation as Lab Member 007, and her fandom of singer FES. Etymologically, "Faris" stems from Latin *fēlis* (cat), aligning with her cat motif, while her real name, Rumiho Akiha, incorporates characters meaning "detain," "not yet," and "ear of grain" for Rumiho, and "autumn leaf" for Akiha.