Hybrid is a property that characters can earn. Hybrid entries specify a particular role and level. A character with a Hybrid property can add the specified role's cards to their deck that are of the specified level. Characters must have reached that level to do this, so if a character somehow obtained a Hybrid property with a higher level than themselves, they cannot include those cards in ther deck. Hybrids of a role already possessed grant no benefits.
In addition to including cards, the Hybrid property grants a very limited version of the specified role's ability. The hybrid version of the ability has no mechanical benefits apart from qualifying the character to play cards that reference the ability. Restrictions on its use, however, do remain.
Hybrid properties are commonly gained from holdings.