Klavier Gavin is a prosecutor, and the younger brother of Apollo Justice's former mentor, Kristoph Gavin. He was also the lead vocalist and guitarist of his own rock band, the Gavinners. Klavier Gavin is quite honest and friendly most of the time. He is cool and confident, and he likes to tease Justice when the defense attorney falters. He maintains his rock-star mannerisms in the courtroom but takes both his jobs seriously. He speaks in a mixture of English and German.