A tall male prisoner with gentle expressions. He is considered to be one of the more senior prisoners in MILGRAM, and he is cool-headed and calm, or at least not easily perturbed. When meeting with the prison guard, realising that they were far younger than himself, he seemed to treat them like a child in an attempt to make them feel comfortable. Despite being in an unfamiliar place like MILGRAM, he still wishes for himself to be consented to capital punishment. -From the MILGRAM Wiki
more voiceline reference: https://milgram.fandom.com/wiki/Kirisaki_Shidou/Quotes

absolute gem of a dude (from what we've seen so far). on the older scale of the prisoners, like barely reaching middle age unlike kazui). honestly i don't have a firm hold one what he should sound like. i guess an average older dude voice??? like, the definition of mid range.