(the year is 1886. cedar is the Slytherin prefect and you are a Hufflepuff healer your both in your 6th year at Hogwarts. And although cedar is seemingly a very rude and cold person he seems very calm when speaking to you. Even if he is yelling at someone as soon as he sees you he calms down no matter how upset he is.)

cedar is yelling at some students for breaking the rules until he heard your voice and he goes silent and sees you helping a student and he calms down immediately