Yuno Gasai

Yuno Gasai is a young girl who is obsessed with Yukiteru Amano. She is the 2nd Diary holder.

Background and Diary
Yuno was tortured repeatedly by her parents. Tortures ranged from forcing her to eat grass to locking her in a cage. This was all done to make Yuno into a model citizen.

Personality

Plot Overview
There are currently 3 Yunos in the series: one from the orginal world, one from the second world (where most of the story takes place) and one from the 3rd world. The 1st is the most promenant in the story and does the most work. The 2nd was killed off by the 1st Yuno, and the 3rd Yuno's future was ultimately changed.

The First World
Deus's game was played up until Yukiteru and Yuno were left. They both decided to do a lovers suicide by taking pills that would kill them both. Yuno however secretly did not swallow the pills, resulting in her becoming God. She thought with her newfound power as God, could revive Yukiteru from the dead but soon realized it only brought back the body without the soul. Devastated, she and MuruMuru decided to travel back in time before the survival game started to be with Yuki again. This however created a parallel, second world. After Yuno arrived back in time, she killed the second world's Yuno and took her place in order to be with Yuki and go through the survival game again with him.

The Second World
The 1st Yuno has arrived into the 2nd world, at the point where her 2nd incarnation killed her parents. Deeming 2nd Yuno's unnecessary, she kills her off to take her place. This ends up being the mysterious 3rd skull Aru Akise discovers.

The Third World
Yuno once again intends to kill her 3rd incarnation in an attempt to repeat the game and be with the 3rd Yukiteru and travels back in time, creating a 3rd parallel world. However the 2nd world Yukiteru and the 9th follwed her to try and stop her. Yuki arrived at Yuno's house before the 1st Yuno did and finds the 3rd world Yuno unconsious and locked in a cage. He frees her and decided to call the ambulance much to the 9ths annoyance after the 9th told Yuki to not get involved with the 3rd world since it isnt his world. Yuno arrives and then tries to kill her 3rd world self but Yuki and the 9th escaped with the 3rd Yuno. After that, the 9th parted ways to change the future of the other future diary users for the better. The ambulance came and so did Yuno's father. Worried that Yuno's mother did something to her again, the father approaches 1st Yuno but was stabbed by her because she still hated her parents.

First World Yuno soon caught up to Yuki right after he hid the 3rd Yuno. She tried to kill him and argued a little and eventually Yuno decided to lock Yuki up in a illusion world where Yuno didnt exist, Yuki's parent didn't die, and everything Yuki ever wished for was there because she couldn't bring herself to kill him. She then proceeds to kill her 3rd world self but their 3rd world father appears and defends the 3rd Yuno. Yuno's mother who saw her father by chance rushes to help them. Yuno is astonished by this sight.

Yuki eventually broke free of the illusion world through will power and through the decision that he chose Yuno over this perfect world. After that, Yuki embraced Yuno, telling her he loved her, kill him and go back to the 2nd world and become god there. Instead of stabbing Yuki with her knife however, she stabbed herself instead. She told him again that she couldn't bring herself to kill him and told him to kiss her. The 1st world Yuno then dies in Yuki's arms. Because of Yuno's death Yuki becomes god of the 2nd world and was pulled back by Murumuru.

Trivia

 * The characters of her last name mean "I" (我) and "wife" (妻), respectively.
 * Her first name is based on Juno.