With ever-changing appearances, changelings reside in many societies undetected. Each changeling can supernaturally adopt any face they like. For some changelings, a new face is only a disguise. For other changelings, a new face may reveal an aspect of their soul. The first changelings appeared in the Feywild, and the wondrous, mutable essence of that plane lingers in changelings today — even in those changelings who have never set foot in the fey realm. Each changeling decides how to use their shape-shifting ability, channelling either the peril or the joy of the Feywild. Sometimes they adopt new forms for the sake of mischief or malice, and other times they don a new identity to right wrongs or delight the downtrodden. A casual shape — one created on the spur of the moment, with no depth or history — is called a mask. A mask can be used to express a mood or to serve a specific purpose and then might never be used again. However, many changelings develop identities that have more depth, crafting whole personas complete with histories and beliefs. A changeling adventurer might have personas for many situations, including negotiation, investigation, and combat. Personas can be shared by multiple changelings; a community might be home to three healer changelings, with whoever is on duty adopting the persona of Andrea, the gentle physician. Personas can even be passed down through a family, allowing a younger changeling to take advantage of contacts established by the persona’s previous users.