Takumi Nishijou is the main-character of the series.
Takumi has long, spikey blue hair and medium-sized, downward facing hazel eyes. He has a long and lankey build with pale skin, most likely the result from spending most of his time indoors. Takumi also tires frequently because of his lack of exercise.
He is usually dressed in his school uniform (a tan jacket with blue-green plaid pants), but can also be seen wearing a plain blue T-shirt and jeans.
Takumi is a shy, quiet person, and does not usually talk during school unless someone addresses him first. Takumi has an obsession with video games and the anime "Blood Tune," which many call him an "otaku" for. Takumi oftenly suffers from "delusions," which are imaginary images that appear realistic, yet never actually happen. Most of Takumi's delusions are unpleasant or awkward, however, Seira-tan is his most occuring (and favorite) delusion. She usually appears whenever Takumi is on his computer, or in his bedroom in general. When Rimi Sakihata (his apparent best friend) held his newest Seira-tan figurine, Takumi stated "Get your hands off my wife!"
Because of his love of video games and anime, Takumi created a "minimal attendence chart" in order to spend more time at home. His attendence chart was the only one that was ever created at Suimei Academy, and for obvious reasons. Takumi is perhaps the only person in his school that does not care about acedemics, and created the chart to receive the minimal credits necessary to pass in his grade. He also has a distaste for "3-D girls," and would rather spend time with Seira than be sociable.