Original Title :The Speedster Saboteur
Original Description:
ZOOMING INTO YOUR SIGHTS it’s Mobian Enjolras I MEAN a very rad hedgehog! The Les Mis soundtrack came on while I was working on Sonic here, and my brain goblin was all “Dress him like the revolutionary hero he’s meant to be DO IT” so let’s just HC that the sweet, sweet vest is a Friendship Gift from Antoine, to which Sonic is like “Dude this is bougie as fuck, but also NO TAKE BACKS awww I knew you liked me ❤️”

Sonic’s (I’m going with ‘Sonntag’ as his birth name) speed is a bit of an enigma in-universe, though it’s proposed that one or both of his parents came within radiation vicinity of a particularly powerful chaos emerald prior to conceiving him on one of their sojourns into an unexplored region of Mobius.
However, they didn’t manifest until he was quite a bit older, specifically around nine when Robotnik’s forces were seeking out Charles after the coup, and Charles told him to run, RUN SON AND DON’T LOOK BACK.
And so he did.

Using his newfound powers to evade capture on the streets in the search for his uncle once he’s strong enough to defend himself from Swatbots. he strikes up a lifelong friendship with another street urchin, Bunna-Marie ‘Bunnie’ Rabbot, with whom he starts out a little gang (including Mina Mongoose and Tails) stealing supplies and food from Robotnik’s forces to deliver to underground refugees and liberating prisoners during transport runs.
When Bunnie herself is captured during one of these missions gone wrong, he’s unwilling to lose someone again the same way he lost Charles (deciding this time he wasn’t going to run away from, but towards the danger) and on this rescue mission, runs into Sally and Antoine who were conducting their own rescue mission for Rotor.

Initially he wants nothing to do with these noble-class newcomers, but relents to joining them momentarily for Bunnie’s sake (the aid she needs is the kind he nor his gang have the capability to provide) and eventually ends up staying as their saboteur when he sees how Sally’s a genuinely compassionate princess of the people and how Antoine helps Bunnie through her recovery.

He isn’t aware of what exactly happened with his dad, and Rotor is quite reluctant to tell him, considering Charles’ unnwitting role in what happened (but Rotor will eventually, since he’s owed the truth).