Im not sure do you need demon for this.
be in solitary with yourself, learn to quiet and control your thoughts and emotions, when you go around people, learn to read them, learn when to talk and when to not, learn to do something little that takes your kinetic concertation of conversations and room situations are happening, like shuffling card deck or have spiritual conversation, learn to be abscent even you are following what is happening, focus on singular conversations, dont start conversations, always tell truth when you speak, even if you would be upright blunt or rude… confirm things they say by looking them straight in the eyes… little things, which makes you seem “darker” or more “extraordinary” than normal beings, more inteligent and focused.
if you want to be slimy playerlike beta fuck, evoke sitri 