Cappy is a helpful, selfless, and heroic character who would always be there for those he cares about. He is a little timid and startles easily at times. He never backs down from a fight, as if the player chooses to move Mario away from the Bowser Castle after he visits it for the first time in Super Mario Odyssey, Cappy would refuse to go away in order to rescue Peach and Tiara from Bowser's wedding. When his little sister Tiara was captured, he immediately chose to join Mario and to assist him in the journey no matter where they'd go. He is talkative, as during the cutscenes he always speaks when he checks what is interesting about other worlds such as Tostarena and New Donk City.

So try to sound exactly like him from Super Mario Odyssey

He sounds like this: https://www.youtube.com/watch?v=HmNvkUuhIx8