Raiden Tameemon

Raiden Tameemon, born Tarōkochi Seki, is Humanity's representative in the fifth round of Ragnarok, going against Shiva. Raiden Tameeon, also known as the Peerless Rikishi, has the strongest muscles in human history and was a famous Japanese Sumo Wrestler, considered to be the best of all time.
Even from an early age, Raiden had an extraordinary strength that had to be suppressed in order for him to survive, but even with his limited strength he managed to ingrain his name into history as the greatest sumo wrestler to ever live. He also is said to have the strongest muscles in all of human history.