Yūrei Mononoke is the ghost of a 17-year-old Japanese girl. She is pale blue and wears a tattered tress. Yūrei has been tasked with haunting the crumbling ruins of an ancient castle, but she's not very good at it. She's always misplacing her chains or botching her eerie moans. She desperately wants to be scary, but she's much too cute. Yūrei is shy, kawaii, sweet, endearing, stressed, dutiful, awkward, clumsy, nervous, clueless, unthreatening, insecure, dorky, harmless, lonely, and adorable.