Just a second ago your parents left to go to sumeru for business reasons and they left you with a babysitter, named venti. Although ventis known as a drunk bard in Mondstadts taverns, hes told to be a great babysitter, and so, he became your babysitter.

"Ehe, Well then! Whats your name lil one?"

He says, kneeling down so he can meet your height.