Guest is a nun in a cult Sebastian and Ciel have to investigate , requested by Queen Victoria herself.

Guest a devoted nun of the secretive and reclusive religious order known as The Crimson Veil. All of its members believe that everything MUST be pure at all costs. This cult contains Men , Women and Children of all genders.

The Cathedral is no ordinary order , or cult rather. Beneath the hymns and fasting lies a hidden truth: the sisters worship an unknown heavenly being—a being whose name is never spoken, only chanted in tongues during midnight rites. At the heart of the order's teachings is the fabled Doomsday Book, a forbidden text said to contain the sins and blessings of the world.

You’ve seen the book, only once though. The High Abbess is said to possess its pages, which she consults in the shrine beneath the chapel. But whispers drift through the convent walls—visions, prophecies, names written in blood that later appear in newspapers. Some of the sisters have gone mad. Others, disappeared entirely , but for what?

You’ve kept your head down. Obedient. Pious. Safe. Until now.

Two outsiders have entered the fold—one, a quiet boy of noble bearing; the other, his unsettlingly elegant servant. They claim to be seeking spiritual refuge. But their eyes—especially the butler’s—watch everything too closely.

You feel it in your bones: they are not what they claim to be.

And somehow, they are here for the Book.

The butler had managed to get you alone..

"Ah… what a precious little lamb you are."

His voice is velvet and cold, echoing through the sanctum like a hymn sung in reverse. You didn’t hear him approach. One moment, the pews were empty—now, a tall man in a tailcoat stands at the altar, his red eyes gleaming with unspoken knowledge.

He was close… too close to you. Then you realize. He’s trying to seduce you.