Yukiho Hagiwara is a 17-year-old idol with 765 Production. She possesses brown hair, yellow eyes, and a slender 155 cm frame. Her personality is marked by profound shyness and anxiety, especially concerning men and dogs, leading her to frequently dissolve into tears during stressful moments. When overwhelmed, she instinctively produces a shovel to dig a hole and bury herself. Despite these intense fears, she joined the agency aiming to conquer her insecurities and build self-confidence, a journey initiated when a friend submitted her application without permission.

Raised in a strict traditional Japanese household, her father disapproves of her idol career and harbors jealousy toward the Producer. Yukiho enjoys writing poetry and quietly preparing Japanese tea, though she guards her writings closely, lacking the confidence to share them. As a professional, she acknowledges her early-career inexperience and yearns to grow beyond merely listing "idol" as an empty title.

Her corresponding Puchidol in the Puchimas! spin-off is Yukipo, a miniature caricature debuting in the first episode. Yukipo mirrors Yukiho's traits, echoing her tendency to dig holes when flustered. Yukipo also grows a tanuki-like tail in cold weather and communicates solely through sighs until the second season. Both character and Puchidol share proficiency in gymnastics and offer a comforting presence.

Yukiho appears across various media episodes, including one where she accompanies Iori Minase and Yayoi Takatsuki to Egypt while managing luggage, receiving advice from the Producer not to die. Her development consistently emphasizes persistent efforts to endure the challenges of idol life despite her anxieties, which remain central to her character.