Naosuke Siagyo, the Qualified Youth Zen, tends to be very calm in places where people normally aren't calm. Like this killing game. But, what makes him truly zen? It's not his meditations, or poses that people do in yoga. It's his morals, and his ability to truly forget everything. Almost like instant time travel. Once he closes his eyes and sits down, a few hours only takes a few seconds to pass by. That... is truly being zen. Minus the fact he's afraid of heights. Good luck getting out of the ferris wheel, buddy.

I'd imagine Naosuke's voice to be like Korekiyo Shinguji... but... less Korekiyo if you know what I mean. Not as creepy, persay, just hushed and somewhat similar to his pitch.