For a voice, I'd like a mid-pitched teenage boys' voice. 

Hajime is seemingly cynical due to how he behaves, but it would be better to describe him as a realist. He is quite skeptical and tends to worry more than the other students, but his worries are often very understandable. He is logical and smart, often annoyed by the idea of not being able to understand someone or something at all. He tends to be quite serious, but he does joke around occasionally and often goes along with his classmates' eccentric hobbies. He can be snarky towards his classmates in his thoughts and he can be blunt at times, though he's more frank than sarcastic or mean-spirited. Though sometimes a bit submissive (especially with bossy girls), he is not afraid to speak his mind. He can sometimes be short-tempered and snap at others, especially when he's tired or under pressure. He was also quite paranoid during the start of the game and didn't have much interest in friendship, but he later really wanted to believe in his classmates and felt bad about doubting them during the Class Trials, but understood it's necessary.