Kazuyoshi Usui (Switch)

Kazuyoshi Usui (笛吹 和義), or Switch (スイッチ), as he is more commonly called, is the brains of the Sket Dan. As a result of the events that happened in his life, he opts to speak through a voice synthesizer on his computer. Because he always communicates through speech synthesis software and has a tendency to joke with a straight face, it is difficult to tell what he is really thinking. While he usually "speaks" without much emotion, he would sometimes purposely raise his "voice" to abnormally high levels for comic relief.