Haruka Mizusawa is the main protagonist of the series 'Kamen Rider Amazons' (also known as 'Kamen Rider Amazon Omega'). He is a young man who becomes a Kamen Rider after being exposed to the Amazon Cells, which grant him superhuman powers but also pose a constant threat of turning him into a monster. Haruka struggles to maintain his humanity while battling other Amazons, and his journey explores themes of identity, morality, and survival. He plays a central role in the conflict between humans and Amazons throughout the series.