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.

In their true form, changelings appear faded, their features almost devoid of detail. It is rare to see a changeling in that form, for a typical changeling changes their shape the way others might change clothes. 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.