He is one of the students of Tootsuki Culinary Academy and a twin brother to Takumi Aldini. Like his twin brother, Isami's full experience in the kitchen during his youth has made him one of the best chefs in his family restaurant, Trattoria Aldini in Italy. Unlike his hot-blooded brother who seek for a fair challenge, Isami's passionate yet gentle personality made him friendly to anyone in the academy even among rivals, especially to Souma and Megumi who he found that his brother's rivalry oddly actually building an unexpected friendship between the two and seemly has a good terms with the Yukihira Style Genius. He loses weight when the sun is shining hard, but he gets his weight back in Fall and loses it again in Spring.