Have you tried it out in RPG Maker MV? Let me know what you think.This isn't to offend you, but to help you for future reference.
The outline isn't good at all. The arms looks like steroids were pumped into it, the back of the head on the sideview is an irregular shape and the chest area looks like the character is hunched over in the front view. Also look out for some jaggies, I can a bit.
Anyways, I know you can do better. Hope this helped.
Thanks. I changed the skull shape just recently and uploaded it. Thank you so much for the feedback.Female version is much better. Great work!