While the Phantron did make an appearance in the original Star Fox game, Phantron never had any dialog or voice. In Event Horizon he’s portrayed in some kind of sealed environmental suit, so his voice will likely have some kind of subtle mechanical filter placed on it. He should come off as almost playful: His ship’s ability to create mirages and become invisible gives him a sense of invulnerability and arrogance and he likely perceives most of the fight against him as shooting fish in a barrel. Otherwise I am completely open to any accent and interpretation of the character and welcome voice actor input.