Amano, Yukiteru

天野雪輝

The series' main male protagonist and the user of the First Diary. Also known as Yuki (Yukkī), he is a 14-year-old middle school student who is a rather quiet boy with anti-social behavior and does not talk much. He mostly observes his surroundings as a bystander and records them in his cell phone diary. Yuki becomes involved in the Diary Game when, to his shock, Deus, a god-like being he had thought was an imaginary friend, turns out to be real. Deus selects him as one of twelve contestants in a 90-day battle royale where they must kill each other using their special diaries, with the last survivor becoming Deus' new heir. Yuki's diary is called the Random Diary; written from his point of view, it gives a detailed and accurate explanation of his surroundings, whether in the present or the future. While versatile in any situation, the main disadvantage of the Random Diary is that it does not tell him what is happening to himself, which leaves him vulnerable. Furthermore, since the diary is written from his point of view, Yuki can be tricked into thinking something he sees is true without realizing it, which is a disadvantage for other people who use the Random Diary.
Unlike most of the contestants, Yuki does not want any part of the game as he just wants to live peacefully and does not want to kill anyone, but is forced to play to survive. He will only kill as a last resort, as he is the main target of the other diary users because Deus sees Yuki as his favorite to win. Because he is weak, in order to protect himself, he quickly makes friends and allies to help him, including Yuno Gasai, a girl in his class who is madly in love with him and is another diary user. Yuki is a kind person yet is naive for quickly trusting people, whether they be friends or other diary users, as they may have ulterior motives. The most complex relationship he has is with Yuno; while Yuno is a formidable ally, her mad obsessive love for him to the point where she is willing to kill or use anyone so both of them can survive scares him, yet despite the many things she does that shock him. Despite this, Yuki still relies on Yuno in order to protect himself.

Spoiler

He is named after Jupiter, the Roman god of the sky, weather and lightning.