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A bounty hunter resembling a cross between Clint Eastwood and Bruce Willis. Although apparently gruff and standoffish, he gradually warms to Solty's presence. His wife, Sarah Revant, died due to cancer and his daughter went missing after the Blast fall event. His top priority is to find his missing daughter, whom he believes is still alive. The only possession left from his daughter is her shoe.
While not realizing that the bandit, Rose Anderson, who made herself at home at his place to get the reluctant Solty to help her on her little thefts, was his daughter until he found out that Solty learned a song from her that his daughter loved as a little child which came from an old record of his that was very rare.
Even after reuniting with his daughter, Roy also proudly acknowledges Solty as his other daughter despite her being a machine, and realizes Solty must carry the burden of humanity alone.