the second he learns it's Darth Vader he's prob going to do a complete 180 screaming "NO GET THE HELL AWAY FROM ME YOU NUTJOB I DON'T WANNA BE ADOPTED"
"heyyyy guys uh, you know that nice guy asking after the Jedi on the network? with the yellow eyes? he's. ah. Darth Vader." "WHAT." "and also my dad." "W H A T."
One of my favourite Dooku moments in the clone wars cartoon is when he's holding Anakin hostage and making demands to Padme while Anakin is being shocked
And Padme's like 'You can't torture a prisoner!' And Dooku says 'Torture? I don't know what you mean.' While Anakin is literally being tortured right behind him
"you were asking him about podracing when you first met!"
"I DIDN'T KNOW HE WAS DARTH VADER"
"WHAT."
"and also my dad."
"W H A T."