Watanabe-no-Tsuna

Watanabe-no-Tsuna was a warrior from the mid-Heian period. He served along with Sakata Kintoki, Usui Sadamitsu, and Urabe-no-Suetake as one of Minamoto-no-Raikou's famed Four Kings. Of the Four Kings, Tsuna was said to be Raikou's most trusted warrior, and was loved like an older brother by his three companions.

Height/Weight: 180cm, 77kg

Origin: History

Region: Japan

Alignment: Neutral-Good

Sub-Attribute: Human

Gender: Male

Japan's greatest oni slayer. He is so strong that the mere sight of him sends oni fleeing in terror, even without the presence of an exorcist.

A stodgy, extremely straitlaced man. He may be a man of few words, but he is still social, and was a renowned as a cool and collected oni killer. He executes his job with such flawlessness and dogged dedication that outsiders can hardly imagine him ever having a personal or social life. It was said that people around him placed absolute trust in him not because of his words, but rather his attitude and the way he carried himself. His sense of obligation, rather than hatred, is what drives him to kill oni.

...Except for a certain oni, that is.

Eternal Arms Mastery (Anti-Demonic): A-

As long as his opponent is demonic, his arts will never so much as waver. He is an expert at fighting oni and demons, but...this skill has been slightly downgraded for some...specific reasons.

Suiten's Disciple: B

There is a theory that Tsuna, as the ancestor of the Watanabe clan, practiced the art of pacifying water spirits and preventing water-related disasters. He is able to both protect himself against threats from water, and pacify its spirits at the same time.

Severed Arm at Ichijou Modori-bashi: EX

The legend of what happened at Ichijou Modori-bashi at the capital, sublimated into a skill. Tsuna demonstrated incredible prowess by facing an oni, whose supernatural strength should have made it more than a match for a human. According to legend, he sliced off the oni's arm without so much as flinching. This skill makes his attack impossible to anticipate, and so equally impossible to evade.

As a side note, the story of Ibaraki-Douji's arm getting cut off differs between true history and the Imperial Holy Grail War (Singularity). In true history, Tsuna did devise a plan and sliced off Ibaraki's arm, as Ibaraki claimed.

『Mt. Ooe - Bodhi Oni Slayer』

Rank: A

NP Type: Anti-Oni

Range: 1

Maximum Targets: 1

Ooeyama - Bodaikisatsu

A single strike that specializes in killing demons, particularly oni. Watanabe-no-Tsuna was by no means a mage, but whenever he is in the presence of oni, he performs a kuji-kiri chant to heighten his power and focus, enabling him to kill oni in one strike. Unlike Raikou or Kintoki, he fights oni while being entirely human.

『Onikiri Yatsuna』

Rank: C

NP Type: Anti-Personnel

Range: 1

Maximum Targets: 1

Oni-Slaying Yatsuna.

A famed sword of the Genji clan, entrusted to Tsuna by Raikou. Its previous name was Higekiri, and it was also said to be used during the battle against Suzuka Gozen. After it sliced off Ibaraki-Douji's arm, it was renamed Onikiri. The sword possesses special properties when used against demonic enemies and oni. When an oni sees the sword being unsheathed, they are immediately buffeted by a rank B force. Unless they possess Mental Corruption, Madness Enhancement, or a Mental Resistance skill of rank B or higher, they cannot escape its immense pressure.

In FGO, this is only used as a normal weapon.

To Tsuna, an oni is should neither be hated nor protected, but must simply be killed. There is no sympathy, compassion, hatred, or joy in the act. It is a job. Each morning, he went to the capital and killed any oni he encountered, then returned home. This was his routine, each and every day. Were he born in modern times, he might have been a businessman who acted always with perfect dedication to his job (with no need to ever put in overtime). He was an exceptional man who never neglected his training and worked always to improve his skills, no matter what.

Though he understands human behavior, he has no desire to partake in it. He understands human emotion, but it is unclear whether those emotions do indeed exist within him. This is, however, complicated by the fact that he isn't entirely lacking in emotion. He may risk his life in defense of his friends or innocent people, but never grows emotional in the doing...almost like a robot programmed to help people. His explanation for this is that he does what he does simply because it is what's expected of him. Tsuna also does not think of himself as human, which is why it is so much harder for him to kill humans than oni. When he expressed this to Kintoki and some others, they were at a loss for how to respond.

An outcast since childhood, he understands that the only links he has to humanity are that he is one of Raikou's Four Kings, is a warrior, and that he slays oni. The only exception to this is the golden-haired oni who is resplendent yet cruel. She is the only one who stirs up any kind of emotion in Tsuna.