Q-Taro finds it very difficult to trust those around him, as he believes more in evidence of peoples characters rather than speculation. His restrictive trust exists because Q-Taro hopes that he's able to protect everyone from any dangers that the Death Game may present to them. He's very truthful and is more of a logical thinking person rather than thinking with his emotions. 

Q-taro's described as having a "weird" dialect, so I would like the voice actor to have an unintelligible dialect. It can sound like a certain accent, but just the teeniest bit off. I also imagine his voice having a medium pitch.