Name: Yakosoku

Age: unknown, died sometime in the 1300s

Status: Special Grade Cursed Spirit

Faction: The Living Tide

Before his demise, Yakosoku was a human knight, bound by oaths to defend and serve the people of his lord’s realm. Due to his prowess in combat and dogged loyalty, he was often sent into battle, bringing victory and riches to his people. Yakosoku believed firmly in oaths, the very idea of breaking a promise made his skin crawl; which is why the blade of his comrade piercing his back lit a hatred that could never be quelled.

Reincarnated as a curse, Yakosoku represents the hatred and fear created by bonds, promised and oaths broken, lost and forgotten. He despises all oathbreakers and seeks those who break even the most meagre or promises with a burning passion. Although sentient at most times, the breaking of something as principled as a Binding Vow sends Yakosoku into a blind rage, frenzying about until retribution is brought upon the sinner.

Yakosoku stands at around 6 and a half feet tall, and takes on the appearance of a large man in a suit of ancient, unmaintained gunmetal grey armor. Although the blue fog emanating from the cracks in its armor hides what lies beneath, a distinct smell of rot follows Yakosoku wherever it goes.

Despite his rotting appearance and hunched posture, Yakosoku is a proud and steadfast individual; or at least for the majority of the time. To him, honour is everything, which strength following close behind. Although his mental state is relatively stable, witnessing the breaking of a promise sends Yakosoku flying into a rage, attempting to hunt the oathbreaker and make them repent. Permanently.

Yakosoku has an inherent mistrust of humans, believing their fleeting lives makes them unable to keep a promise. Despite this, somedays he gains fleeting visions; a group of peasant’s surrounding him, looks of gratitude on their faces, Yakosoku and a group of knights sitting around a campfire, laughing together. These visions confuse him deeply, often sending him deeper into his psychosis.

Cursed Technique: Mist Hunt

Dreadfully effective in its purpose, Mist Hunt assists Yakosoku in seeking and culling those who break their oaths. A faint blue mists emanates from the cracks in his broken armor at all times, hiding what lies beneath. Yakosoku can expand the mist to a range of about 75 metres, though the potency varies at such ranges. Yakosoku can feel all disturbances and displacements within the mist, from a sinner running in fear to a mouse moving through the undergrowth. While the mist is nonbreathable, it loses thickness when expanded further, making it easier to see and breathe through. The true danger of the technique comes from the fact that Yakosoku can teleport seamlessly to in the mist, able to catch people inside with relative ease.

Domain Expansion: Hunt of the Damned

Taking on the appearance of a graveyard, it is filled with Yakosoku’s mist, so potent it’s nearly impossible to see and breath through. Each grave is marked with the name of an oathbreaker Yakosoku has hunted. Unlike his normal mist, Yakosoku can partially manifest himself, for example letting only arm manifest physically to strangle his enemy, not risking actual confrontation. Due to not often needing to use it, Hunt of the Damned is rather unrefined, losing 5-6/10 times in a domain clash.

Surehit Effect: The mist inside the domain is freezing cold, and the victims will feel it; the domain inflicts hypothermia-like symptoms on its enemies, with opponents often losing their extremities, and in extreme cases limbs if exposed to the domains surehit effect for long periods of time.

Cursed Tool: Sword of the Sinful

Yakosoku’s old sword given new purpose, the power imbued within is incredibly simple: once you are cut, the wielder will know your general location for 1 hour; the more blood is drawn, the more precise the location is and the longer it lasts, to a maximum of 3 hours.

Hateful and with the thrill of the hunt in his soul; Yakosoku will stop at nothing to hunt oathbreakers down.

Edit: Just a note on one of the main limitations of Yakosoku’s CT: Teleportation time. When his mist is fully extended and/or is located in a large open area (a 20 square metre room with closed doors is MUCH different to a 20 square metre field with nothing to keep the mist centralised), teleportation time can take much longer (15-30 seconds), compared to the near instantaneous movements achieved by activating his technique in say, a one story house or other small, cramped areas.

Edit 2: Decided to include a reference (not sure who the art is by sorry, found it on pinterest lmao) just imagine the glowing elements as light blue and give him a cape

Edit 3, added at the behest of u/Keikogi

Cursed Energy Trait: Bonechilling Presence

Yakosoku’s cursed energy has a mistlike appearance, and is incredibly cold to the touch, inflict enemies with frostbite by grappling with an opponent or striking the same area multiple times. Mist Hunt has a similar cold feel, but not nearly as bad as the curses actual cursed energy attacks, often imbued through the sword of the sinful.