Miles Edgeworth, being the protagonist of the series, will not have any breakdowns himself. However, he is integral for lead-ins to the breakdown and needs to convey the conviction needed of a man of the law taking down a criminal. He will be required to shout and act accusatory toward the characters that do break down.

For his voice, while there are plenty of voice examples from things like the anime and some games, you're welcome to either sound close to canon, or improvise slightly. Though an air of confidence and strong will is required.