Gaara

While Gaara had initially tried to be kind to others, despite the people's fear of him, Yashamaru's actions and false words changed him. Realizing that no one loved him, Gaara used his sand to create a kanji tattoo on his forehead with the word "love" (愛, ai), as a symbol of what he is, a "demon who loves only himself." himself", and living up to his name, as his mother, Karura, supposedly believed. Gaara quickly became emotionally withdrawn, almost silent, and was gradually consumed by a bitter loathing for everyone, but, at the same time, he became convinced that he only cared about himself and his "mother": the voice of Shukaku in his head. . He learned to find pleasure and ultimately a reason to live in annihilating the multiple assassins sent to kill him and, by extension, anyone who threatened his existence. This was made worse by Shukaku, who would not let him sleep and, as a result, Gaara was always looking for a way to quench his bloodlust, which resulted in a ruthless Gaara; This was demonstrated when he murdered Bai and Midare, and ignored their pleas. Gaara's insomnia was driven by the fear that the demon within him would eat his mind while he slept, which fostered his instability and further increased the desire to kill. His hatred also extends to his brothers, since he never saw them as such, and was completely willing to kill those who crossed them and if necessary, to satisfy his desire to reaffirm his existence.