Hannah Annafellows

The only maid of the Trancy household. A demon known as the "sheath that contains the demon sword Lævateinn," storing the magical sword within her body. She is a quiet beauty with long silver hair and tan skin, always wearing a look of melancholy.

In the first episode, her left eye is gouged out by Alois, and until she forms a contract with him, she had it bandaged. Alois, unlike with Claude who is also a demon, despises her for being "unpredictable" and mistreats her.

She was the one who, having previously formed a contract with Alois's brother Luka, destroyed Alois's village and consumed Luka's soul as part of their contract. Moved by Luka's pure love for his brother and gratitude towards her for consuming his soul, she comes to love Alois, Luka's brother, and visits the Trancy household along with the triplets to fulfill Alois's wish.

She is brutally defeated by Grell, who impales her, but being a demon, she heals from her wounds. Shortly after, she takes Alois's eye, killed by Claude, into her body and awakens Alois within Ciel, who had been brainwashed by Claude. After Alois's awakening, his eye is transplanted into her left eye. She confesses her love for Luka and Alois in the rose maze and forms a contract with Alois.

On the Isle of Death, she makes Sebastian and Claude duel over Ciel's soul, following her contract with Alois, and after turning Ciel into a demon, she stays by Claude's corpse with the souls of Alois and Luka inside her, sharing their fate as the Isle of Death crumbles.