General feeling.
Not much is being known of this character, but by the look of him, specifically his hat, the weapons he uses (an old one shot pistol and rapiers), Hellscout seems to be very much inspired from Solomon Kane, the character originally created by Robert E. Howard.
Just like Solomon, he is extremely accurate with gun-like weapons and a master at sword fighting.
Other hinting features are his tendency to use old fashioned english and his obsession to fight evil and ultimately kill the “devil” he thinks Annihilus is.