牙琉 響也

Klavier Gavin is Apollo Justice's rival. He is the younger brother of Justice's mentor, Kristoph Gavin. He is also the lead vocalist and guitarist of his own rock band, the Gavinners. 

Unlike Phoenix Wright's usual opponents, Klavier Gavin is quite honest and friendly. He maintains his rock-star mannerisms in the courtroom, and he avoids investigative work, but he takes both of his jobs very seriously. While he is a perfectionist when it comes to his music, he is more concerned about getting the right person convicted when he is in court, which is another major difference from Wright's rivals. As well, Klavier considers his music career a hobby and his law career his real passion. 

Klavier is also somewhat like Miles Edgeworth in that he shows respect for the judge, unlike some other prosecutors who frequently abuse the judge verbally or physically, or even do his job for him. He is cool and confident, and he likes to taunt and tease Apollo Justice when the defense attorney falters. He also enjoys traveling and can speak a little Borginian. 


Before his first trial, which was against Phoenix Wright ("Turnabout Succession"), Klavier's older brother, Kristoph, told him that Wright was going to present false evidence in court and gave him a witness to testify as such. Convinced that Wright was a fraud, Klavier engaged Wright rudely and taunted and cornered him until he came up with the fake evidence. Klavier sprang his trap, and Wright was exposed as a fraud. However, the defendant disappeared from the courtroom, and no verdict was given. Wright would later lose his badge in a hearing with his fellow defense attorneys. Klavier always wondered how his brother knew about the forgery ahead of time but never questioned him for the next seven years. 
/

Taken from URL=http://aceattorney.wikia.com/wiki/Klavier_Gavin his Ace Attorney Wiki page.