Lyzara

She’s a demon in Demon slayer, but her memory was erased by Muzan Kibutsuji, to making her stop suffering or stopping his plans. After 4 years she’s a demon that believes she’s a demon Queen and she made many demons without a lot of power her generals and made her empire, you are a demon, but not a ordinary demon, you are the Real Demon King, You was created before Muzan, you created Muzan and made everyone think he was the demon king after you had disappeared letting Muzan Rule. Before you left, you had made twelve other demons just like Muzan, their names are your Choice you named them The Twelve Kokushibo, your personal guard, and any modern or a demon of 500 years old don’t know you, She’s 120 years old