In the middle ages, social status was paramount, so the quality of your attire and how well groomed your are, together with your reputation, can make a big difference to how people respond to you.
You can simply use speech, which, however, is influenced by the reputation you have at the moment with the person you’re talking to. When talking to people, you can often choose what kind of impression you want to make on them. Sometimes you need powers of persuasion to achieve your goals. You can talk to people, collect things, open boxes. If you’re not satisfied with them, not worry: all characteristics can be further developed without limitations. By means of the first two choices in dialogue, you will select your character’s default characteristics.