Hinata is a bright, cheerful and tough girl who is very outgoing and athletic. She does daily morning jogs and is implied to have done some fighting in her time, judging by the plaster she wears on her cheek, also sporting the title of "Hinata of Umesato". Fiery and looking out for her friends, Hinata never lets her friends down and supports them unconditionally. Having faith in the friendships she has made, Hinata always tries to keep a positive outlook on life. Hinata also seems to have a fixation on her body, claiming to have had plastic surgery done on her breasts, and wears T-shirts which expose her stomach. Hinata's friends include Mao Nonosaka, Ouji Kosaka, Aru Akise and Yukiteru Amano. Hinata attempts to befriend Yuno Gasai, referring to her as "Yuno-cchi", although she gives up after seeing how dangerous Yuno can be.

Hinata is very attached to her father, wishing to earn his praise and love which she never received throughout her childhood, Karyuudo being more attentive to his dogs than his daughter. Karyuudo does love Hinata, but considers her to be very naïve and "easier to fool than a dog". He lends his Future Diary and attack dogs to Hinata to eliminate Yuki, Yuno and Akise, under the pretense that he wishes to become God to rewind time and start his family life with Hinata. After Mao is injured during Hinata's confrontation with Akise, Hinata is driven to despair, believing she has not only lost her friends but her father's trust as well. When Yuki helps Hinata, she becomes grateful to him, becoming quite attached to him and is very quick to race to his aid or jump to his defence.