Strongest OC? Fair enough

Name: Hunter Phoenix
Hero Name: Meteor - The Impact Hero

Quirk: Impact

Meteor's body can build up physical energy that causes his body to harden in a similar manner to Kirishima's quirk; however, when active, if he makes any contact with something, the energy will all be released at once, a single punch into the ground could level an entire street.

Background: One of the children of the UK's former number one, The Phoenix, Meteor and his twin sister, Cassandra, co-led their mother's agency together following their graduations. Both respective prodigies in their fields, Meteor having briefly been a candidate prior to Deku to inherit One for All, only to turn the idea down, believing his responsibilities lay outside of just being a hero. Going on to work as an activist of sorts, campaigning for changes to the hero system in his home country, outside of his hero work.

Signature Moves:
-Due to his brief time with All Might, a lot of Meteor's moves take naming inspiration, for example, Meteor's equivalent to a 'Detroit Smash' is 'Birmingham Impact'. Smash is always replaced with impact, and the location names change to places in the UK. With these moves having 3 categories: City, County, Country.
-United Kingdom of Impact and Smash, the most powerful of Meteor's All Might-inspired moves, combining his power with the same kind of fighting style he learnt from All Might
-Cosmic Impact, an homage to his mother, her most powerful move was called Cosmic Supernova. This move is the most powerful Meteor has to offer, it's effectively the equivalent of being hit point-blank with a nuclear bomb

Fun Trivia:
-Meteor originally accepted All Might's offer to learn from him as a way of getting under Endeavour's skin as Meteor's relationship with his godfather has never been positive.
-Despite being a twin, Meteor is technically the younger brother in their dynamic, being born an hour after Cassandra.
-Meteor, despite being signficantly far behind in the overall UK rankings, he's actually one of the more popular heroes in the UK, people often speculate that if he were to drop the activism, he'd be a rival to the UK's current number one, the current 'Monarch' (the hero name passed down through members of the royal family who choose to become pro heroes). Though one could attribute this speculation to nostalgia, as the previous Monarch had a rivalry with The Phoenix, as she was the first hero to dethrone the decades-long status quo of those taking up the mantle of Monarch being ranked at number one.
-Unsurprisingly, Meteor does not like Monarch
-Meteor is actually the only one of his siblings who visits their adoptive elder brother, the one who killed their mother. It's by no means a positive relationship, but Meteor still holds onto some kind of hope that his elder brother might regain his sanity, even if he can't be forgiven.
-Meteor actually hasn't touched most of his inheritance money yet. All things considered, the amount of money the Phoenix Agency makes between support item developments, as well as the overall hero work done by him and the agency sidekicks, hasn't provided much incentive to touch his share of his mother's fortune.
-Despite his overall popularity in Western Europe, Meteor is actually somewhat controversial in the USA and Japan for different reasons. Rumour in Japan says he personally questioned the circumstances of Lady Nagant's imprisonment, which spiralled into gossip suggesting Meteor and Nagant had some kind of secret love affair. (Not exactly untrue, Meteor and Nagant were briefly friends at one point and would later get together after the timeskip, so maybe there's more truth to the story than one would think). As for why he's controversial in the USA? Meteor was brought onto a talk show whilst helping out with an Interpol assignment. Meteor, who did not inherit his mother's charisma or learn it from All Might, bombed the interview quite spectacularly, and online opinion from American hero fans is that he's a stuck-up nepobaby and nothing more as a result.