Inheritors were beings that were, through unknown means, born with the Third Period abilities of an individual from the Second Period. The abilities "inherited" were ones unique to the original earthlings and could not be learned by anyone who wasn't born with them. In some cases, such as Rahab Barisol's Prophetic Dream ability, inheritor abilities were tied to the physical body, and could be passed down to an inheritor's descendants. This made some abilities specific to certain families or clans. In other cases, inheritor abilities were tied to the soul and could be retained by an individual even if they moved to a new body or vessel, as with the case of Irina Clockworker and her blue fire magic inherited from Salem Dunbar.
A type of ability possessed by Yegor Asayev and his descendant Mikhail. In the instance of Yegor, his special vision allowed him to see and identify others' inheritor abilities. Meanwhile, with the case of Mikhail, he was born with an artificial eye that allowed him to see through opaque surfaces.
A type of ability possessed by the priestesses of Lighwatch temple, such as Zellana and Elluka Chirclatia. Inheritors of Held could cure HER, and were thus sought out for this specific ability by the Asayev Family.
- In-universe, "inheritor" is a term coined by sorcerers from Magic Kingdom Levianta.
- The Zvezda family was theorized to be descended from Held Yggdra, though Eve herself is an inheritor of Levia.