三嶋 鳴海

Member of the Metropolitan Police Department’s 12th Public Security Division. Optimistic and stong-minded. A "Cyclopedia Syndrome (CPS)” patient, wherein she can remember anything she has seen. She is called to Integral by an email from Makoto, wherein she learns about Ψ and its users, Ψcliminal. She fights to prevent their plan, the "Second Eclipse Project".

Narumi is the Sublime of "Maina Narumi," whose Ego was separated from her body and remained stranded in World R at a young age. Her remaining Sublime developed her own Ego, and was adopted and renamed into "Mishima Narumi."

Narumi is the older sister of Takae Myuu and Kiridera Mei.

She is voiced by Satou Rina.