Ashley Ōno is a supporting character in the story, a thirty-two-year-old certified tax accountant who specializes in financial consulting and tax optimization for creative professionals, particularly light novel authors. Despite her profession suggesting a conservative appearance, she is known for wearing lolita fashion, a style that contrasts with her serious and highly competent nature. She has blonde hair and blue eyes, and her petite figure belies the formidable presence she commands in her professional circle.

Ashley is characterized by a personality that blends reliability with a distinct sadistic streak. She is meticulous, sharp-witted, and highly competent, approaching her work with an intimidating and dominant attitude that leaves even seasoned writers like Itsuki Hashima trembling when they fail to submit receipts on time. Her professional approach is notably unorthodox yet effective; she makes her clients reveal their personal interests and fetishes through their expenses, skillfully categorizing items like anime merchandise as legitimate business deductions to maximize their tax returns. This combination of fearsome taskmaster and indispensable financial guardian makes her an invaluable, if frightening, ally to the struggling authors she represents.

Within the story, Ashley primarily fulfills the role of the group's financial anchor, managing the complex affairs of the main characters as they navigate the light novel industry. She interacts with the main cast largely through her professional capacity, but her presence extends beyond mere number-crunching. She is the only person among Itsuki Hashima's close acquaintances who knows the secret that his younger brother Chihiro is actually a girl, a fact that places her in a unique position of trust. She is also shown to have a history within the publishing industry, as evidenced by her reminiscing about a former popular author named Kasuka Sekigahara with veteran writer Makina Kaizu, revealing a deeper connection to the creative world than just its financial ledgers. Her development is subtle, revealed through these glimpses of her past relationships and her continued role as a steady, if intimidating, presence who ensures the financial survival of her clients as their personal and professional lives grow more complex. Her notable ability lies entirely in her exceptional expertise as a tax accountant, a skill that proves crucial for managing the unpredictable income of freelance creatives.