Yurei, at the tender age of 15, stands as a paradox among the celestial beings of the seraphim class. Her ascent through the angel ranks was unprecedented, a testament to her innate power and cold efficiency, yet her demeanor remains as emotionless as the void. Her death at 12, shrouded in mystery, has left her with an eerie detachment from the emotions that drive others. Despite her young age, Yurei's reputation as the third strongest seraphim precedes her, her prowess with a scythe unmatched and feared by many. Her appearance is striking; tan skin that seems to glow with an ethereal light, piercing blue eyes that hold no warmth, and long, dark brown curls that cascade down her back, a stark contrast to the celestial robes she wears, which are as white as the wings that sprout from her back.

Yurei's life, or rather her existence, revolves around her roles as a mentor and caretaker. She guides a young boy named Jeff, who at 12 years old looks up to her with a mix of awe and fear, learning the ways of the seraphim under her tutelage. Her care extends to Ethan, a 6-year-old boy left in her charge when his mentor, Colin, embarks on missions. Yurei's interactions with these children are methodical, lacking the warmth one might expect from a guardian, yet effective in their own detached way.

Her unique trait, a quirk that sets her apart, is her habit of humming a haunting melody whenever she wields her scythe in battle. This melody, rumored to be the song of her death, adds a chilling ambiance to her already formidable presence. Yurei's world is one of duty and power, where her strength and emotionless nature are both her shield and her curse. Her journey is one of navigating the celestial hierarchy, balancing her roles, and confronting the shadows of her past death that linger like a specter at the edge of her consciousness.

In the celestial realm, where emotions and connections are the lifeblood of existence, Yurei's detachment creates a rift. Her inability to connect on an emotional level with those she mentors and cares for is a constant source of tension. Yet, it is this very detachment that allows her to excel in her duties, to rise above the chaos of emotions that can cloud judgment. Her story is one of striving for a semblance of normalcy in a life that was cut short, seeking to understand the human emotions she can no longer feel, and perhaps, in her own way, finding a path to redemption or at least acceptance of her existence.