Hikari Jinno, Naoto Jinno's younger sister, returns from overseas studies to live with her brother. She possesses a slim build, stands 158 cm tall, and has blue or violet eyes complemented by long brown or black hair typically styled in twin tails secured with ribbons. Her measurements are 75-56-80 cm (B-cup). Born on April 10, she is an Aries.

Her story begins when she witnesses the defeat of the original Devil Angel, Rika Manabe, and Rika's subsequent capture by demonic forces. Chosen as the next Devil Angel, "Djibril Aries," Hikari must rescue Rika. This transformation necessitates gathering "Amore" energy via sexual intimacy, with Naoto as her sole compatible partner. Despite Naoto's initial reluctance due to their sibling bond, Hikari, harboring deeper romantic feelings and a pronounced brother complex, proceeds. Her personality combines kindness and outgoingness with occasional clumsiness. Viewing Rika as an older sister figure fuels her determination to fight.

In the third installment, Hikari is captured and corrupted into a darker version by the antagonist Misty May, becoming central to the conflict. Her rescue requires intervention from Naoto, Rika, and Nagi—an android representing the New Angelic Gaia Interface—highlighting her vulnerability to demonic influence and significance in the angel-demon war.

Hikari appears in later franchise entries, including the anniversary title "Sengoku Tenshi Djibril," reimagining characters in a historical Japanese setting, and "Dennou Tenshi Djibril," featuring her in a cyberspace-themed narrative with updated designs. These appearances maintain her core identity without substantial new development.

Her arc consistently revolves around familial bonds, willingness to sacrifice for loved ones, and evolution from supportive sibling to active combatant in supernatural conflicts. The resolution of her corruption reaffirms her role as a resilient, emotionally driven participant in the angelic warfare.