A war of two sides is the first "adventure" in the Humanity's Strongest story. This tells the story of how Tenma met Ichigo, Goku, Elliot, and Integra. It also tells of Johan's relationship with the heroes and the villains such as Isaac Ray Peram Westcott, Major, Sōsuke Aizen, and Frieza Cold.
Johan Liebert - Johan Liebert is the main antagonist of A War Of Two Sides. He creates the Major that starts the war of the story. He is also the one directly responsible for Aizen ripening insane as well as Westcotts obsession with the Major.
Frieza Cold - Frieza Cold is the secondary antagonist of A War Of Two Sides. He enslaves the earth and puts cruel and inhuman laws that only the most twisted can think of.
Sōsuke Aizen - Sōsuke Aizen is the tertiary antagonist of A War Of Two Sides. His life is ruined by Johan and is desperate to find the dragon balls and wish Johan out of existence.
Isaac Ray Peram Westcott - Isaac Ray Peram Westcott is the quadery antagonist in A War Of Two Sides. After noticing the evil within Johan, Westcott tries to capture and force Johan to make a war machine for him.
Major - The Major is the quinary antagonist of A War Of Two Sides. He is a war machine built by Johan and obsessed by Westcott. He cares for war and war only with the death of 30 million people by series end.
Kenzo Tenma - Kenzo Tenma is the protagonist of A War Of Two Sides. He is a doctor that saved many lives but accidentally saves the wrong life which ruins his life and searches for the dragon balls to correct his horrid mistake.
Son Goku - Son Goku is the deuteragonist of A War Of Two Sides. He comes across Tenma one day and helps him on his quest to find the dragon balls and correct his mistake.
Ichigo Kurosaki Ichigo Kurosaki is the tritagonist of A War Of Two Sides. He was once an assassin but reformed when in Tenmas care.
Elliot Baldwin Woodman - Elliot Baldwin Woodman is the tetartagonist of A War Of Two Sides. He formed the Ratatosker which is a organization that helps others out that are injured of in need.
Integra Hellsing - Interga Hellsing is the penatagonist of A War Of Two Sides. She is the founder of the Millennium which is a secret group hidden by the Ratatoskr that fights against enemies.