Lerajie is a female Crimson Denizen who serves as an adjutant to the powerful Lord Sydonay, sharing this position with the Denizen Orobas. She is a supporting antagonist in the third season of the anime, appearing primarily as a military commander within the Bal Masqué organization. Lerajie possesses a light complexion, long lilac hair, and golden eyes. She is regarded as a powerful Denizen, noted for her ability to sense the use of Unrestricted Spells and for her high tactical skills. Her personality is characterized by cunning and a willingness to manipulate subordinates to achieve her goals, and she is capable of engendering strong loyalty in those she commands.

In the story, Lerajie takes part in the strategic planning of Bal Masqué's campaign against the Flame Haze, attending a military briefing held in the Seireiden. She is consistently seen alongside Orobas, and the two work as a pair in battle. Together they lead an army against the Flame Haze organization Outlaw in Greece, and later directly intervene in the defense of the Palace of Stars. Her motivations align with Sydonay and the Trinity's broader objectives, and she shows no significant personal development or change over the course of the series. Her key relationships are with Orobas, her frequent partner, and Sydonay, her superior. Beyond her tactical mind and spell-sensing ability, no other unique powers or abilities are highlighted.