Meet Lupin! He's a mercenary of sorts that specializes in sabotaging villainous schemes be it through heists or other means. He is also an expert in forging power and warp rings for perosnal use. Skills he acquired due to coming from a family of ring mystics.
Lupin is mischievous but is quite a gentleman too. Especially around women.
He is actually a friend of Rouge's and the two have done a couple heists together. He finds her obsession with jewels rather amusing though isn't always approving of her jewel heists. (And teases her about her crush on Knuckles. She returns in kind when she finds out he's developed a crush on a certain "Guardian Angel")
He also has a rather odd relationship with The Chaotix. Mainly in that Vector has beef with him yet is good friends with Espio and Charmy. The beef having come from Lupin beating Vector to the punch on some cases. (Unintentionally most of the time.) That and Vector isn't a fan of how Lupin does his work. It's lead to an odd dynamic of Vector chasing after Lupin when he's gotten in his way. Lupin finds it to be a fun game and loves the thrill of it.
And that's all I have for now. ;) More to come as I develop him. Hope you enjoy.