Royal Blood is the blood of Regis Nex and his descendants. This blood can unlock many things, including the Caladbolg's seal.
Known characters who posses this blood
- Just had to steal blood before releasing the seal, since he is not a descendant of Nex's. It is uncertain if the blood Just stole from Ninurrta is what opened the seal.
- Since Ninurrta Noah ran away before releasing the Imperial seal, it is still unknown if he posseses the royal blood.
- It is not yet known if Siana posseses royal blood.