Hinata is often used as a source of comedy throughout the series, one example being his conflicts with Yui and Naoi. Although he is friendly to anyone, he is only aggressive to Yui, Noda and Ayato Naoi. He is also the most friendly in the SSS and the most happy-go-lucky in the group. He was the first one to use the term 'Tenshi(Angel)' when addressing Kanade Tachibana. He also once called Ooyama 'Yampaii' because he thought it had more personality. He sometimes gives nicknames, such as 'Yurippe' (Yuri) and 'Shiina-chi' ( Eri Shiina). He also becomes Yuzuru Otonashi's friend, and his flirtatious nature causes Otonashi to suspect that he might be homosexual, which he always denies. Hinata is a young man with a bright and dependable personality who becomes the first unofficial member of SSS (he becomes partners with Yuri Nakamura before the founding of the SSS and decides he will follow her no matter what) along with Ooyama (Hinata's human roommate) and he also is the one who started calling Yuri as 'Yurippe' because Yuri was his mother's name and he felt strange calling her that.

His usual neck-length blue hair had been around a mid-buzzcut. Before his death, Hinata had a shaved head shown in episode 4, 'Day Game' in his flashback. He has the same height as Yuzuru Otonashi which is 175.5 cm (5'9') tall. Instead he leaves his coat open which exposes the plain white buttoned down collared shirt, underneath he sports a maroon red T-shirt. Unlike some of the SSS males He chooses not to wear the red tie originally paired with his uniform. On Hinata's left shoulder the SSS battlefront symbol can be seen.

The pockets, outer collar and sleeve-tips are rimmed with a chocolate-brown color. A sandy/beige long-sleeved collared uniform coat with buttons going down vertically on its right, and a breast pocket on its top left along with horizontal pockets on each lower side. He wears the same mandatory uniform as the rest of SSS (excluding Ayato Naoi). Hinata has soft royal blue hair that ends at his neck along with somewhat messy bangs and sharp royal blue eyes (they have been a lavender/purple color in some appearances) that match the shade of his hair.

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