The Letter was once what people now call "The Note". Basically The Note in his younger ages, when he was still learning spells and other magical lessons with his uncle Exorcist in the strict dimension, Eternity. The Letter does find it a bit annoying of how strict things are in Eternity but stays there to study and learn anyway. He has a few close people known to him in the dimension, so he doesn't mind it that much. The Letter loves tea and giving him any makes him happy.