Crest

Crests are a game mechanic introduced in Fire Emblem: Three Houses. Similar to the Holy Blood from Fire Emblem: Genealogy of the Holy War, many of the nobility, who are descended from Fódlan’s Ten Greats who fought during the War of Heroes, hail from families that bear crests. Crests are passed down by bloodline, but not all descendants inherit crests and only a small number of people can invoke their abilities.

Crests are divided into “Major Crests” that contain immense power and “Minor Crests” whose power is weaker. Generally, it’s believed the stronger the hero’s blood, the higher the chance of having a major crest. But a child with a major crest can suddenly be born and the reason behind this is currently unknown.