Ari is one of the students of the Weeque Valley National Academy and also the classmate of Hiasen and Bizet. She is frank and blunt, she also has a blurred sense of what's right and wrong. When Hiasen and Ari first met, she asked him whether he would like her to help in the exam by which she meant to help him cheat. Ari is quite sharp and good in reading people. She catches on fast that Sena and Ten are keeping an eye on Hiasen. She also cares a lot about her friends and would even sacrifice herself just to protect them, just like when they were attacked by the Black Raincoat.