Henrietta de Tristain (アンリエッタ, Anrietta) is a supporting character of Zero no Tsukaima. She was first introduced as the Crown Princess of Tristain. After her father died, a power struggle erupted in the palace which forced her to take over afterward. Henrietta and Louise are childhood friends. It is unknown if her father died of natural causes, or if he was murdered by assassination. She is loved by the people of her country and later became Queen of Tristain. She has to hold off an invasion from Albion after the assassination of the Albionian prince. Henrietta is a beautiful girl with short purple hair and teal blue eyes. Her usual outfit consists of a purple cloak, white silk dress with tight sleeves that reach up to her fingers, white stockings and white high-heeled shoes. Also she wears a diadem on her head.