Boku no Hero Academia
History's Strongest Quirk
A fusion between HSD and BNHA. And while I can't say that I know for certain what All For One and his successor's intricate plans are, I get the feeling they'd be VERY compatible with Yami. Plus I can EASILY see Hayato being the former Number 1 Hero and the Symbol of Peace before All Might took the throne from him in an epic free-for-all match on some remote Pacific Island that was utterly destroyed during the match. Kenichi would either be Quirkless or have a very weak one that he bolsters initially with martial arts before learning how to increase its power and thus making him one of the top student fighters.
Ryouzanpaku Quirks
Hayato – Invulnerability (can become an unstoppable force like Juggernaut of Marvel to bash his way through anything, which is why he's always training to boost his strength and his Quirk's maximum power, but he can still be swept off his feet since his own physical weight isn't affected)
Akisame – Binding (can turn any non-living thing he touches (like concrete, metal, clothes) into a malleable substance that he can use to tie his opponents up)
Apachai – Animal Communication (can talk with and understand any animal he meets, but he usually prefers birds because of their free-spirited ways)
Kensei – Flexibility (able to contort, bend, shift, and extend his body at unnatural angles, allowing him to dodge and/or surprise attack his opponents, but requires incredible and regular physical stretches and strong joints)
Sakaki – Killer Eyes (able to freeze anyone with weak minds or constitutions in place when he glares if he's feeling a negative emotion, but using this too much tends to make him very aggressive and moody, making him prone to using his Quirk more often, alcohol helps him keep his Quirk in check)
Shigure – Ghost Blade (can turn any weapon she wields into a ghost blade that can faze through all living organic material, allowing her to cut the clothes off her opponents without giving them even a single scratch)
Miu – Feather Dance (can create small platforms of 'solid air' for her to jump and walk on, granting her unprecedented maneuverability but it requires powerful leg muscles)
Kenichi – Runaway (possesses very powerful leg and feet muscles so he can run at high speeds, especially if he's experiencing a powerful emotion like terror, giving him a cowardly reputation of running away from danger) (still not entirely sure if this would be his Quirk or not)
Shinpaku Alliance Quirks
Niijima – Alien Control (alien powers like Brainwash, Analysis, heightened intellect, etc. as in canon)
Takeda – Impact (can boost the striking power of his knuckles, but at the risk of breaking his hand if used too much)
Ukita – Slam (create control the earth and ground around him, making it harden or soften up when using his Judo throws to deal more damage to his opponent, he's been known to create miniature impact craters or earthquakes in the ground around him and/or his opponent to throw off their balance so he can grab and slam them, he's got a tremendous fear of heights since he's only as strong as the ground he's standing upon)
Ragnarök Fist Quirks (*League of Villains recruit)
*Odin – Mind's Eye (can listen to an opponent's inner voice to predict their next action in a fight, needs extremely fast reflexes to react in time)
*Berserker – Extreme Speed/Strength (once he shuts down his mental limiter, he can go 100-150% for a max of 10 minutes but at the cost of potentially wrecking his body permanently, so he trains himself to be extreme levels)
Freya – Telekinesis (touch-sensitive initially, uses a staff as a medium for greater range, has to train herself intensely to boost her power because her tk can only lift as much as she naturally can)
*Loki – Super Deduction (a part-Dutch kid, he can predict how anything can turn out if he has enough knowledge on the people, places, and things involved in the incident, unknown variables can throw off his predictions, so knowledge is power to him)
Siegfried – Kinetic Redirection (he can absorb physical trauma and kinetic energy like through punches and release them into his opponents, turning their strength onto themselves, but he must release the energy fairly soon or he'll be affected by it as there's a limit to how much he can store)
Hermit – Clothing Hardening (can harden any organic material like leather or cotton but it requires constant physical contact and is limited by natural durability of the material, silk and leather are his preferred clothing)
Thor – Sonic Slap (can create sonic booms when he smacks his hands into something but the sonic boom affects him too, so he needs enormous bulk to help protect himself)
Valkyrie – catgirl (agility, claws, cat senses)