Rei Ryūgazaki is the scientist and artist of the series. Despite being all about formulas and studying, he actually really admires the aesthetic appeal of sports. He's very passionate about how beautiful the world is and is appalled by anything that doesn't fit his definition of beauty. He's very to-the-point and blunt when he wants to be left alone. But he could ramble for ages about the formulaic patterns of sports and what makes them beautiful. He can be seen as cold by some people, but to be honest, he's just a huge dork.

Rei's voice is low. He has a somewhat posh tone to his voice, but you could make it sound humble, if you wish. Though he's all about facts, he's also very passionate and driven by his emotions, so do keep this in mind.

Voice references for convenience : Here, here and here.