Theo & Castor ISO Concepts

I’ve been very slowly working on my ISO project while working on many many many other freelance things but wanted to share these concepts I made up for the twin characters in it. A while back I’d done a poll for Castor’s name on my Patreon and I think I’ve really grown to like it for him, they’ve gone through quite a few name changes over the years so it’s nice to finally solidify it! Some old concepts for these two can be found in my Old Concept Art books from 2016, but they are much much older than that. Maybe I’ll do up a 2003-2026 timeline at some point for them. I am very excited to draw these two more! Wanna see sketches of these? Check ’em out on Patreon!