With the ability to imbue his words with mana, he is the Curse Blighted. Because anything he says will be affected by his mana, he normally wears a bird-like mask, which has earned him the name "Crow the Dark Raptor." During battle, he uses his Cursed Speech in order to support his comrades. His inability to speak freely, due to his curse, made him seem introverted and gloomy for a long time, but, with Lloyd's help, his powers are now under control, and he seems much more cheerful.
(Source: I Was Reincarnated as the 7th Prince so I Can Take My Time Perfecting My Magical Ability Official Site)
