Valeria Luna, also known as Inaho Misora in Japanese, is an 11-year-old Floridablanca resident with short purple hair, blue-gray eyes, and signature round glasses. Her usual attire consists of a pink jacket featuring white and blue striped cuffs layered over a blue shirt adorned with a partially obscured yellow music note, paired with a white denim skirt, dark blue leggings, and yellow sneakers with white laces. Alternate outfits include winter wear and costumes from the second film.

Highly energetic and talkative, Valeria obsesses over space, aliens, and anime—especially "Sailor Nenas"—collecting merchandise and habitually comparing real events to anime plots, much to USApyon’s annoyance. Though easily distracted and occasionally lacking common sense, she keenly spots inconsistencies in information. She rarely shows sadness, opting to jump when disheartened to lift her spirits.

She idolizes Nathan Adams for his bond with Yo-kai, though he considers her clumsy. Partnered with the stern Yo-kai USApyon, their contrasting personalities co-manage a detective agency with Blanpir. Valeria shares a passion for the band "Pussycat Miau" with Jibanyan and interacts with classmates Jessica and Clara. During the second film, she mistakes Enma Daioh’s robe for cosplay. Her family includes an unnamed mother, a father working in the U.S., and a younger brother, Ricky, who frequently snoops on her.

Valeria appears as a playable character in "Yo-kai Watch 3" and "Yo-kai Watch 4++" (Busters mode), with minor non-playable roles in spin-offs like "Yo-kai Watch Wibble Wobble" and "Medal Wars." Her anime role was reduced over stereotyping concerns, though the creator included her as an Easter egg. In "Yo-kai Watch 3," she befriends Enma Daioh. Localizations alter her name, such as "Celeste Duque" in early Spanish manga translations.