The Human Vapor, in his humanoid form simply resembles a Japanese man, enveloped in a blue glow.
Mizuno was a former test pilot but retired after he was mysteriously infected and confined to a sanitorium for an extended period of time as a result. He later became a librarian until a man by the name of Dr. Sano offered Mizuno to become a "test subject" for scientist's projects. However, the tests backfired and Mizuno became an indestructible vapor man. He then began a life of crime in an attempt to support his girlfriend.
The Human Vapor is able to convert his entire body to a gaseous state at will. When in this form, he can wrap himself around people's heads, causing them to die of asphyxiation. He is also able to disappear into thin air.
- Main article: Human Vapor/Gallery.
- The Ultraman Gaia monster Wolf Gas is a partial homage to The Human Vapor, combining that character's gaseous transforming abilities with a more obvious werewolf motif 
This is a list of references for Human Vapor. These citations are used to identify the reliable sources on which this article is based. These references appear inside articles in the form of superscript numbers, which look like this: 
Showing 3 comments. When commenting, please remain respectful of other users, stay on topic, and avoid role-playing and excessive punctuation. Comments which violate these guidelines may be removed by administrators.
<comments voting="Plus" />