Fremea Seivelun (フレメア＝セイヴェルン Furemea Seiverun?) is a character introduced in Shinyaku Toaru Majutsu no Index. Merely a level 0 elementary schooler, she however becomes connected with the various intrigues of the world of Toaru Majutsu no Index. Being the little sister of ITEM's Frenda Seivelun and cared for by Skill-Out's Komaba Ritoku, she becomes a central character in the movement of the story and its characters in Shinyaku Toaru Majutsu no Index solely by existing. She is the linchpin of the Agitate Halation Project and her very existence ties with several moments relating to her safety.