Kiki brushed back her luxuriant black hair then she tied it with a satin ribbon

Where does a semicolon go

Kiki brushed back her luxuriant black hair; then she tied it with a satin ribbon.

The semicolon is emboldened.

Explanation:

The semicolon is a punctuation device used to join two sentences that are inherently complete on their own and join them without the use of any propositions or conjunctions but simply putting up a punctuation mark.

The punctuation mark serves to show the very apparent connection between the two sentences that are complete on their own but now have a connection through the semicolon so they are to be read in context of one another.