Kosuke Nito is a major character in the series Kamen Rider Wizard, known as Kamen Rider Beast. He is an archaeologist who becomes a secondary Rider, using the Beast Driver and magical powers derived from chimera magic. Kosuke is cheerful, energetic, and somewhat eccentric, often providing comic relief. Despite his carefree attitude, he is courageous and reliable, fighting alongside Haruto Soma to protect humanity from Phantoms while seeking to maintain his own magical life force.