|Base of Operations||Saint Ishiyama Academy|
|Manga Debut||Chapter 182|
Arihara is a tall, young man with short dark hair. He is bespectacled with dark framed glasses.
During his match in the Saint Saint X'mas competition, Arihara wore a tracksuit for males. The tracksuit consisted of a dark jacket and dark trousers. The collar of the jacket, which was kept facing upwards, plus the ends of the sleeves and jacket itself, were crafted from a light-colored latex piece. A single light-colored lined stretched across the middle of the jacket with a light-colored zipper while a thick, horizontal line of a similar color stretched across the front and on the upper sleeves. Underneath the jacket is a light-colored shirt. Arihara also wore light-colored shoes with his tracksuit. Like his partner, Madoka, he wore his jacket zipped closed.
Saint Saint X'mas ArcEdit
In the first round, they are selected to go sixth, pairing off against the Suzuki-Kamijō pairing, where they end up winning in the first round. Afterwards, they are selected to fight Izuma and Aoi. As their match begins, both couples get changed into jogging suits, and then they step up to the boxing ring in the high school's gymnasium to face each other; as they are all introduced, Arihara quietly notes how they are facing against Izuma. He listens to the instructions and proceeds to allow Madoka a ride on his shoulders; later, upon seeing Aoi fluster about the nature of their event, he develops more hope for his pair's victory. However, the match commences anyway and Madoka's bandana is retrieved immediately, causing them to lose, and not without a blatant look of shock from both teenagers. Arihara then sulks about his loss.