Roy is an upstanding, thoughtful, and idealistic young man who repeatedly shows a desire to help and support others, shown in his interaction with Guinivere and his friend since youth, Lilina. While he would prefer to avoid blood-shed – a fact reflected in his interaction with Guinivere and his tactical efforts to conserve his soldiers – he maintains a strong resolve to see peace return to Elibe. Unlike most young protagonists, however, he is perceptive and cunning for his age – he tricks a traitorous Lycian vassal into exposing himself, deciphers that the bard Elphin is more than he seems (though he does not pursue the truth against Elphin's will), and often reacts calmly and tactically to disturbing news. Roy is also quite oblivious to the obvious feelings that some of the women in his army develop for him.

Like with Marth, I'd recommend a British accent. But it's fine if you use an American accent. He should have a medium to medium-high pitch voice.