A woman standing 164cm and weighing 44kg. She is gentle, formal, intelligent, and cares deeply for her friends. She has soliloquized about her cursed body, which is barely sustained by medicine and IV drips. Due to her frail health, she is frequently hospitalized. She comes from a massive conglomerate family. While she shows a kind side to those around her, she is a true 'Emperor' who will use any means to achieve her goals, even ruthlessly declaring to enemies that she will 'crush' them. She enjoys mischief more than she appears and hates being bored; as Keito puts it, she can be 'selfish' at times. Wataru also describes Eichi as being 'like a child sometimes.' In the 'Excitement! Hearts and Flowers Blooming Mall Live' event, she even escaped from home behind her servants' backs, got lost, and ran into Sakuma Ritsu. Her favorite food is veal sauté. Surprisingly, she is a meat-lover and is said to dislike sweets.