Do you want to compare Hammerhead with Oya? Discover the powers, weakness & weapons of Hammerhead and Oya from Hammerhead Biography and Oya Biography. Find out all about Hammerhead and Oya.# Check out how is Hammerhead unique and distinct from Oya. Discover their love interest, sidekicks, family tree and the movies and games list in which Hammerhead and Oya have appeared. Find out everything about them here!