Alexander Normandy - Ultimate Sprinter - Alexander tends to brag quite often, and acts like he's the perfect person. When presented with flaws, he'll tend to either ignore them or insult the person pointing them out. Even with those flaws, he is very charismatic and brave, and tries to help out as much as he can.

I imagine her voice as medium - deep, and a little loud. He stutters quite a bit when embarrassed 

If I had to describe what I want his voice to sound like based on already existing Danganronpa characters, I would say Kiato/Kazuichi.