Hikari Sumaru is a supporting character in the anime Dead Dead Demon's Dededede Destruction. She is depicted as a young adult woman with green eyes and black hair that falls to her chest, and she is often seen wearing a jacket and has freckles.

In terms of background, Hikari works as a female employee of S.E.S. (Santilli Element Solutions). Her role is within the public relations department at the development center for a domestically produced combat weapon known as the "Fujin". Her professional duties involve overseeing and managing the television activities of a character named Miura.

Regarding her key relationships, Hikari is a former classmate of Miura, although she had not crossed paths with him for about ten years prior to him visiting the company. She is also romantically involved with a character named Naoki Watarase, though their relationship is described as being largely nominal in nature. Her personal development is marked by a significant change in this area, as she eventually leaves Watarase to be with Takarada, who serves as the team leader of the Fujin development center.

Information regarding her personality, deeper motivations, specific abilities, and overall role in the main narrative is not readily available in the provided search results.