Because Fey Have Feelings, Too From the introduction: Often a tool or blunt instrument, familiars can be used by casters to investigate and explore at their whim. Whether it’s using their perception to keep watch or as a disposable method to check for traps, familiars are fey spirits with long memories. Long, long memories. What if your familiars became loyal—or disloyal—based on how you treat them? This guide, for use with find familiar, is a tracker for players to determine how their actions influence their familiar’s behavior. When shared with the DM, this tracker can provide personality for your familiar and consequences for your actions.