"I call this 'owling,'" Santos says. "When Mao does this, he's 'owling' you because he's too lazy to turn himself to your direction, but wants to keep an eye on you."
"He doesn't purr like other cats," Santos adds. "His breathing literally intensifies when you're having a good cuddle session with him. He also snores in his sleep, but he'll never admit to it."
It all adds up to a cat unlike any other - a cat who didn't found a nation like the man he was named after, but rather his own private kingdom.
"He is my spirit animal, fur baby and best friend rolled in one," Santos says.
You can follow Little Chairman Mao's adventures on Instagram.