Ukei Kaito

"Yes, yes! SHOW ME YOUR DESPAIR!"

- - Ukei Kaito

Ukei Kaito is the former Hero of the other world and the main protagonist of Nidome no Yuusha.

Personality
Initially, Kaito was a kind and caring boy who would do anything to help others. However, after being betrayed and discovering that his parents, his sister, his friends and his teacher were used as a sacrifice to summon him, his personality completely changed to that of a cold, cruel, brutal, unstable, relentless, vindictive, bloodthirsty and sadistic killer.

Kaito won't be a fool. He won't fall for their lies and platitudes. He will return every inch of pain they inflicted on him and carve it deep in their hearts so they never forget his name. They will regret using him; after all, he will not give them the satisfaction of a quick death. Even if they plead, beg, or cry, Kaito will only laugh. There is no respite from his beautiful and bloody path of revenge.

Appearance
Handsome and psycho

Background
He was originally a Japanese high school student from Earth, but was summoned by Alesia to defeat the Demon Lord. In the first timeline, he succeeded in this role. In spite of his love for Leticia, the Demon Lord, he overcame her but soon found himself betrayed. Painted as the next Demon Lord, he was hunted down by society and his former companions, dying in the dirt with a sword through his chest.

The hero Kaito Ukei died. Blood seeped from his wounds, his body went limp, and the ones who he once called friends gloated over his death. Betrayed, Kaito was consumed by one thought: revenge. With this will, a system message announced that the Holy Sword of Vengeance activated, and time began to rewind—all the way to when he was first summoned to this other world.

After his death, however, he found that he had experienced Tutorial Mode, an ability of all with souls from Earth. The Goddess of Earth had instituted Tutorial Mode in order to enhance the survival of those summoned to the other world, giving them a second chance upon death to learn from their mistakes. Kaito, however, took an entirely different path in his second incarnation, seeking vengeance on all who had wronged him in his first life.

Skills
Although he is good at close combat, he has no magical talent. However, the above-mentioned sword can cause a phenomenon close to magic. [Ch. 167]

Detail:

 *  《   Spirit Sword 》 
 * The unique skill " Heart/Spirit Sword " is the ability to form and use swords made with magical powers with different shapes and abilities as needed. Due to the abilities and effects obtained from the sword, he is a Japanese who is not familiar with combat techniques, but he is competing with enemies in another world. A new sword will be added if a specific action or condition is met (eg, Devil's Egg Sword → Dungeon Core Destruction).
 * Form:
 * Holy Sword of Revenge/Sacred Sword of Vengeance
 * A new heart sword that the seaman got just before his death in the first world. It has the effect of making it easier to detect the malicious intent and hostility of the enemy. In addition to being able to be used as a normal sword, by sticking this knife-shaped sword into the chest of an opponent with strong hatred, a contract of revenge is signed with the ama, and new abilities are revealed to the contractor. Those who have signed a contract will see each other's revenge memories, and the revenge partner will be shared. Since life is shared, it is impossible to betray each other and kill them. The seaman refers to the person who signed this contract as an accomplice, not as his companion or ally. He also explains why he's signing a contract, "because it's likely to be a more fulfilling and wonderful revenge than doing it alone."
 * The title『Ruler of Vengeance』itself slightly increased my overall status, but the effect of 【Sacred Sword of Vengeance】 has been updated to accompany it.
 * Sword of Deadly Sin・ Man-Monster of the Gluttonous Swamp
 * Skill:
 * 『Gluttony』: It released a dark hole materializes and the hole swallows the attacks and disappears as if nothing had happened.
 * The sword-form [big fleshy sword with a vivid flesh color] 『Employ』 state in use, rather than the human-form 『Released』 state. The Deadly Sin series, which is formed in the form of a sword, can be used without chanting, and no demerits, like with the other Spirit Swords However, it possesses no outrageous ability and compelling force like the Spirit Swords that takes a human form in its 『Released』 state, and can only use its ability on a lower scale. A power that loses its might as a trump card in exchange for convenience. However, what is important here is that the two people in front me knows about the convenience and the power of the human-form in its 『Released』 state.
 * Sword of Deadly Sins・ The Little Girl in the Coloring Box
 * A slender sword carrying a sword blade that changes in seven colors.
 * Skill:
 * 『Lust』 a box which appeared from behind swallowed the opponent. The box containing the two disappears while making a whooshing sound.
 * They’re not dead. The Deadly Sins series do not possess enough power to kill them in the 『Employed』 state. But, they can forcibly teleport.
 * Immortal Peach Resurrection Sword: A sword that specialized in recovery, but the magic power consumption wasn’t anything to scoff at, and my armor and clothes are worn out. Even if the user have any wounds, the physical strength is continuously being drained.
 * Verdant Green Crystal Sword: Heal a single target by pouring mana into the blade (No instant Recovery).
 * Fire Spider's Leg Blade: It can light a fire
 * Eight Eyed Clear Origin Blade
 * Spatial Sword of Heaven

Relationships
to be added.

Trivia
to be added.

Quotes
"So. Who do you want to kill? Just... who is the one you want to take revenge on?"

- Ukei Kaitoo to Minaris. "Isn't it obvious? I would be able to think much more enjoyable vengeances with more people, don't you agree? Besides, there is a lot of work that has to be done in order to hurt, torture and break those bastards, don't you agree? I don't have any needs for guys who are satisfied with killing people but you're not like that, right? Right?!"

- Kaito revealing Minaris of his desires for vengeance