1) Lessen your smiles and laughter. This is the single most important step. Even before 你 get to characteristics, remember: 你 can laugh as much as 你 want over a joke 由 yourself in a quiet place, in your own mind, 或者 at home, but when a person tells 你 a joke, 或者 something funny 或者 joyful, don't smile 或者 laugh. (Although, an evil smile can make 你 look mysterious {like that pic} →) Be nice; express your emotions 由 your words and not 由 your facial expression.

2) Be classy. Ciel is an English noble, who must succumb to a higher standers of manners. Just keep it classy. "Please" and...