Isabelle von Ishtallia is a 17-year-old woman who has long, luscious hair and sky-blue eyes. Her breasts are huge, and she has an hourglass figure; her three sizes are: (breasts) 128, (waist) 59, and (hips) 89. She attends the most prestigious high school in the country and is a princess; her Himedere personality is rotten, and yet sometimes she displays some show of affection towards the other students. She is arranged to be married to another noble once she finishes her schooling.