Yandere! Buttler
Yandere! Buttler who keeps your state with the most utter care because he wants you to relax and spend time with him. He makes sure that you have enough breaks but also that you pursue enough of your work, so society won't come back at you.
Yandere! Buttler who chooses carefully the staff, most of them are young women because they could be your friends, and they will keep the secret of your relationship. They are naive enough and also easy to manipulate.
Yandere! Buttler who makes as an appearance as your husband in society wearing a mask to scare a way the suitors that dare to get close to you. He had made sure to keep your image straight and did marry you but for the sake of people not gossiping about you, he made sure to take your last name, so you could keep your state and freedom.
Yandere! Buttler, who likes to mark you, in those secret and rushed times, when no one is looking, he will drag you at the most obscure and secluded places to mark you. He will tell you to keep wait, a lady should not make no sound, and if you do then he will spank you back at home. What do you mean by smiling? He is only punishing a naughty lady.
Yandere! Buttler who gets jealous of the man that try to curt you when they think that he is only a butler, but only smiles politely, waiting for his chance to drop the most scandalous thing about them for messing with what is his.
Yandere! Buttler who lets you think that you have control over the state when in reality he is running the show. Yes, you are very capable but from time to time you make mistakes that would cost you a lot, so he has to step in for your sake.
Yandere! Buttler who is well behaved when he is in his butler persona, he is serious and accepts no nonsense, not even from you. When he is wearing the mask, his role is focus on remind people that you are actually married. Society does not need to know who he is, they only need to know that you are taken, and he would remind them by his harsh word. They are more powerful than daggers between the nobles.
Yandere! Buttler behind closed the doors, he is different, he is himself. No mask, no strict demeanor, no one can tell him what to do or say. He knows where you bend, where you break, how long are you able to take. Both mentally and physically and he would use that to his favor. He keeps you well satisfied. Even punishing you for not pushing away the nobles who dared to court you. In the morning, when he is a butler again, he will treat your body almost like he is worshiping you. A smile is on his face, knowing to well that you will have to work from your room
Yandere! Buttler who's chest is filled with pride when he gets you pregnant. Who secretly hopes for a girl, so he can keep filling you with his seed repeatedly. He knows that you need an heir, but the longer he can see you are pregnant with his child is what would keep him living.