Renko Usami is a university student majoring in "super unified physics". Renko is 22 years old, 167cm / 1,67m tall and weighs 248kg. Renko usually wears a black hat with a bow, white suit, a brown dress and a black shawl. She has brown hair and eyes. Most of her weight rests in her belly, so despite having a sizable derriere and thighs, Maribel has a very belly-heavy appearance, with a vast belly split into two large rolls of fat. Despite having to waddle slowly, she can walk for long distances.