Urari, one of the classmates of Erin, is "the Geek" of Erin's class. He doesn't like fooling around and puts studies as priority one. He was annoyed with Erin's too much curiosity in the class in the beginning but gradually starts to like her as a very good friend. He came out of his ways and offered Erin with his notes to help her study before the exams to show his admiration and friendship for her.
Urari was the first to leave Kazalm upon graduation in tears, others followed soon afterwards. (Episode 36)