Be aware that 'coquettish' can imply different attitudes about gender and flirting in various cultures. In some cultures, her coquettish behavior is seen as confident and charming.
Pro Tip 2/3
Slightly Pejorative
'Coquettish' may carry a slight negative tone, suggesting intentional teasing or playing with emotions. Some found her coquettish demeanor to be manipulative rather than innocent.
Pro Tip 3/3
Gender Association
Traditionally associated with women, but can describe any gender portraying flirtatious charm. He gave a coquettish wink that surprised those who knew his usual stern demeanor.