Urumi Kanzaki is a student belonging to Onizuka's homeroom class, Class 3-4. She does not attend school regularly and as a result is introduced in volume 7 of the manga and episode 16 in the anime. She is the childhood friend of both Tomoko Nomura and Miyabi Aizawa. She is the antithesis of the " dumb blond " stereotype, being a beautiful girl with naturally platinum blond hair and an IQ of over 200. Urumi has heterochromia, which is an eye condition that causes her eyes to be different colors. Her left eye is blue. Her right eye is brown. Despite her beauty and intelligence, Urumi is not very popular. Her classmates, with few exceptions, think she's a freak because of her IQ and because of her heterochromia. It also does not help that Urumi is known for " classroom terrorism ".