When creating my character concept art for Kingdom Hearts, I made the character on the left. It looked good, but didn’t really fit the Kingdom Hearts series, because there was well too much going on. The original had skeleton arms, detachable arms, which changed what the character could do and his abilities and just in general got really complicated.
I changed my design to only having one arm from the Unversed Iron Maiden instead of the Prison Keeper’s one. I chose this arm for the ability for the character to hold a weapon and not get so complicated. Everything else in the image stayed the same thought, except now he has sleeves on his jacket.