Tetsuya Nightfall, or just Tetsuya, is the Guild Master of the Independent Guild, Dawn Horizon and a powerful wizard known throughout the world for his incredible usage of lightning magic. He's built up a reputation of sorts as a "lady killer" due to his devilishly handsome looks and charming personality and is quite popular. That said, he cares nothing for all that attention as he's actually in love with Mizuki and has been having issues confessing to her, which isn't helped by the woman's constant teasing of him.

He's around the age of 21-23 and has a mature somewhat deep voice that betrays his youthful appearance. That said, he's still a young adult so his voice shoudn't be too deep and should sound like a calm and collected "cool" kind of guy with a charming accent.

For a reference, his voice should sound akin to something like this: http://www.youtube.com/watch?v=h6-xViUdTi0&t=0m38s