During his first appearance in the series during the Final Selection test, Kiriya portrays himself to be polite, competent, and somewhat emotionally detached having calmly and politely greeted the trainees in sync with his sister, professionally explaining the details regarding the test. He is somewhat unfazed when Genya roughly manhandles his sister. Later on, Kiriya shows an entirely different side to himself, displaying his capabilities as a leader. He immediately jumps into his new position and organizes himself to monitor and command the Demon Slayers on their attack against Muzan Kibutsuji. He shows more mental fortitude and emotional strength in comparison to his younger sisters, who momentarily broke into tears in grief.

If you could sound similar to his English VA, Christine Marie Cabanos, that would be great, but it is not required!

English VA Example: None but he has a high-pitched child voice as he is voiced by a female