Walking next to a vampire, the medium will recognize him! The same with aliens and disguised aliens, other occult Sims and. Sensitive Sims like to be quiet and prefer mystical places, but how to find them? Think of all the secret places in our worlds, but I don't like spoiling you too much. In this last case, it's better close your Sim at home.
The most of the time they are focused because they can feel beyond ordinary things they can have good influences by the moon and bad times with confusion in their heads.
Their mood and needs are influenced by places and other Sims, especially occult ones. Medium Sims are really sensitive to the paranormal activities.