A Human Shaped Battle Aura is a manifestation of user’s ki that instead of surging around their body and exerting outwards in the form of an aura, it generates a larger version of user.
A Battle Aura is the physical manifestation of one’s ki projected outward and given shape around their being. With a Human Shaped Battle Aura instead of interlacing the energy so that it makes an aura user uses Hōkōryū to project their ki while still maintaining the flow of their body. This technique is incredibly draining as so long as it is active, it draws on the user's ki in large amounts and the bigger reserves of ki user has the larger the version they can generate of themselves. It also requires a great deal of concentration in order for the ki to maintain it’s human form