Really fun concept and yeah, B1 is nice, I find C1 (due to the bolder pants color) interesting as well, but maybe just because it's a bit more casual/nonchalant and thus captures the energy of the first sketches. I can really imagine him sitting in an office cubicle with a cigar, just sighing and getting up to fight some baddies in C1
Here is the transformation he will most commonly use when fighting, it protects his upper body while allowing him to attack and move quickly.
I would also like to create a defensive form and an aerodynamic one, to resist heavy attacks like explosions and run super fast. I don't know if I'll have enough time for this, I'm pretty slow when drawing