So the inspiration I did for Rouge, and Sonic, is the old concepts for Sonic in Sonic adventure 2, and trying to keep a somewhat classic look, this one specifically was used for Sonic:

And this one was used a little for Rouge.

I do the same thing with Uhhhh Metal sonic, which I had in a doodle post I posted before.

I've drawn way more irl, but cant show since my BEEEEEITCH ARSE dad took my phone FOREVER.