Future Diary Paradox

秋瀬或

Aru Akise (秋瀬 或, Akise Aru) is one of Yukiteru Amano's friends, and later becomes one of the main characters of the series. Aru is very intelligent and dreams of being a world famous detective when he gets older. Investigating the connections between Yuki and the diary owners, Aru becomes a close ally to Yuki, but an enemy and rival to Yuno Gasai. Aru quickly grows to love Yuki and wishes for him to become God. He is the main character of the spin-off manga Future Diary: Paradox, where he and Muru Muru replace Yuki and Yuno in the survival game after Muru Muru accidentally kills Yuno Gasai while Yukiteru is injured.

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ムルムル

我妻由乃

Yuno Gasai (我妻 由乃, Gasai Yuno) is the main female protagonist of the Future Diary series. She is the Second in the Survival Game and she is the owner of the "Yukiteru Diary/Diary of Future Love". She is obsessed with Yukiteru Amano, the main male protagonist of the story. He is her love interest.

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雨流みねね

Minene Uryuu (雨流 みねね, Uryū Minene) is the Ninth Diary Holder and possesses the "Escape Diary". She is also the main protagonist of the spin-off Future Diary: Mosaic, which focuses on Minene before and after she gains her Future Diary.

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天野雪輝

Yukiteru "Yukki" Amano (天野 雪輝, Amano Yukiteru) is the main male protagonist of the Future Diary series. He is the First Diary Holder and in possession of the "Observance/Indiscriminate Diary", also called as the "Random Diary" in the anime. He is the love interest of Yuno Gasai in the Future Diary series and Aru Akise in Future Diary: Paradox (a side story in a separate timeline).

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春日野椿

Tsubaki is a slender, attractive girl with red eyes; her irises have a dull luster to represent her poor vision. She has long dark blue hair; some of it is pinned up with a red butterfly-shaped hairpiece or ribbon, while the rest hangs loose, partly covering the right side of her face and reaching her hips in the back. She wears a red-orange kimono tied at the waist by a thick white ribbon.

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デウス・エクス・マキナ

Deus Ex Machina is the God of Time and Space and a major character in both the Future Diary manga and anime. He creates the Future Diaries (with the help of John Bacchus) and holds the Survival Game to find a suitable successor to his title before his imminent death causes the destruction of the universe.

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来須圭悟

Keigo Kurusu (来須 圭悟, Kurusu Keigo) is the Fourth diary owner, and initially introduced as an ally to Yukiteru Amano and Yuno Gasai. As the Chief Inspector of Sakurami City's police force, Kurusu uses his "Criminal Investigation Diary" to predict the crimes that he will investigate, using its power to identify other diary owners.

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宮代お鈴

Orin is a young girl with long brown hair and brown eyes. Her most notable feature is how her hair is styled into thick, rectangular strands around her bangs and face.

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船津

Funatsu (船津, Funatsu) is the second in command of the Omekata Cult led by The Sixth, Tsubaki Kasugano. Serving as a minor villain, he himself appears little in the series, but played a crucial role by twisting Tsubaki and Reisuke Houjou to the point of insanity. He appears in Future Diary: Paradox, serving as a secondary villain to Aru Akise and Tsubaki.

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