In the Japanese version of the series, Kira is voiced by Sōichirō Hoshi. Hoshi expressed joy in voicing the character and was happy when redoing his character's lines for the remaster of the series. One of Hoshi's favorite lines in the franchise is "I still have a world I want to protect!" in the final episode of "SEED" when facing Raw as he felt it was heartwarming. Another aspect Hoshi enjoyed in regards to his work was how Kira and Athrun become allies in the 39th episode following multiple fights across the anime. For the English dub, he is voiced by Matt Hill, who got the role thanks to a friend from the dub's director, who told Hill not to have too much energy when doing the voice. The line "Kira Yamato! Launching!" was repeated by Hill several times when obtaining the role. Hill remembers enjoying his work, having taken a liking to the character. Max Mittelman replaced Hill for the NYAV dub.