What Yamino said, but he left something out.
Kagemitsu was totally mute. He had his vocal cords ripped out.... actually, not long after that picture, in a really bad car accident. He couldn't made a single sound, not a hum, tweet or nothing involving vocal cords. he made up for it by having a lot of facial expressions, sign language and wonderful whistling capabilities.
And he was awesome at Descent and Gunstar Heroes.
*sighs* Damn, that kid was great..... Him and Lacus both.... And to think...