TV-Series
Description
Hiiro Yano is a university student majoring in psychology, known for her mature and caring personality. She acts as an older sister or maternal figure within her group RONDO, counseling members on their concerns and firmly scolding selfish behavior like neglecting healthy eating. Her care extends to fellow members Nagisa and Tsubaki, with interactions sometimes humorously compared to "parents' day," and she occasionally refers to herself as "mama."

She possesses light lilac hair and eyelashes, slanted gray eyes, and wavy sidelocks that were later slightly trimmed. Hiiro designs and crafts all of RONDO's costumes and has a long-standing cosplay hobby. Under the alias Scarlet, she hosts cooking streams showcasing her culinary skills, sometimes incorporating her cosplay, and later expanded her content to include ASMR.

Hiiro exhibits unique traits: she handles slimy textures like sea cucumbers without discomfort and owns a pet ferret that displays burrowing behaviors. However, she harbors a fear of dark, confined spaces. In *D4DJ Petit Mix*, she identifies stress as the cause of Nagisa's recurring nightmares, which threaten RONDO's performances, and helps address the issue. Her dynamic includes a comedic conflict with Kurumi Shiratori, who schemes revenge against her, leading to a decisive confrontation.

A notable distinction in *Pucchimiku D4DJ Petit Mix* is her unique ability to temporarily break the series' stylized chibi format, reverting to her standard appearance. She participates in group activities like RONDO's bar celebration, where discussions about love arise among members.

Her name combines "Yano" (矢野, field of arrows) and "Hiiro" (緋彩, crimson color). She has been featured in crossover events with alternate designs based on characters like Nakano Ichika and 2B.