He's the one who takes things seriously the most, besides Mio (Eevee), according to Zander. Having a harsh past and abusive father, he has gone through quite a lot.

In my opinion, I think he has self-doubt and low confidence in himself, perhaps due to the abuse and high standard from his early training. He doesn't usually easily trust anyone. Then again, despite his quiet, sarcastic and distant nature, he wants to help out his friends and does so whenever he can. Zander is loyal, genuine, and trustworthy. He is 15 years of age.

According to Zander, closest thing he could imagine him sounding like was Riku from Kingdom Hearts, except British... although....

HUGE UPDATE: Anyone doesn't have to do this exactly, as to give anyone more of a chance, no need to be British or whatever. It is up to anyone's interpretation on how the character would sound and such, and hopefully who knows which could be the closest, it depends.