A lot of characters in anime are completely consumed by their thirst for vengeance. This overpowering need to seek revenge ends up being the driving force behind everything they do, even if they lead others to think that they have ulterior motives. These anime characters want nothing more than to take their full revenge on those who have wronged them, in the grand tradition of sick and twisted anime characters.
Of course, vengeful anime characters often suffer from tragic back-stories that involve a lot of heartbreak. These hardships are all emotionally traumatic to the point where it totally takes over the lives of the victims. These events all pave the path of vengeance for these anime characters who want revenge to stride down in full force.
As one of the last surviving members of the Uchiha clan, Sasuke from Naruto is an anime character whose only real goal is vengeance. Throughout the entire series, he strives to become more powerful so that he can fight his older brother Itachi, who exterminated his entire family.
Also Rankedsee more on Sasuke Uchiha
Ryuko Matoi, the main protagonist of KILL la KILL, has sworn to find the other half of the Scissor Blade that she wields. Why? Because the other half was used to kill her father. She transfers to Honnoji Academy, the primary setting of the anime, in order to fight the woman who wields the other half of her weapon.see more on Ryuko Matoi
Lelouch vi Britannia, AKA Lelouch Lamperouge, is the Eleventh Prince of the Holy Britannian Empire and comes from a family well-accustomed to bloodshed. He seeks vengeance against his mother's killer and the Empire that cast him away, while striving to achieve a safe world for his younger sister, Nunnally.
Also Rankedsee more on Lelouch Lamperouge
Afro Samurai takes place in a kind of futuristic, feudal Japan. After seeing his father decapitated in front of his own eyes, the titular Afro sets out on a path of vengeance to find the Number One headband and bring justice to his father's memory. Throughout the series, he ranks as Number Two and is forced to carve through a horde of enemies who try to usurp his position.
Also Rankedsee more on Afro Samurai