Mash is purely fictional. The plot and characters are made up to provide entertainment and not drawn from real-life events. The story is crafted to engage and captivate the audience within a fictional world.
It really depends on the particular manga. Some depict Mash having the ability to use magic, while others might not. It all comes down to the creator's imagination and the story's requirements.
I don't really know. It depends on various factors such as Winchester's writing history and the specific context of MASH. You might want to explore libraries or literary databases to find out.