If you're playing the game and haven't at least reached Chapter 22, you may want to wait, or a pretty neat boss will be spoiled for you. Spacing it out to make sure.
Pandora jumps into a reset spring and returns, from a ghoulish ball of flame into a beautiful, borderline flirtatious Goddess. She has a bunch of heart animations; in the cutscene where she transforms, she winks.
In addition, a bunch of her attacks are hearts and one is a blown kiss. The heart attacks are common, but the blown kiss seems to only occur from a certain range, and it homes in on Dark Pit. I could only find one video as of yet, and the quality is sub-par with minor commentary.
http://www.youtube.com/watch?v=wXK3zh4Ot_Y (Good quality wink starting at 10:15, around 11:08 she feigns death and comes back up sending hearts out, then follows up with her usual heart attack).
http://www.youtube.com/watch?v=3Hb3A53JEE4&list=ELCicxtKZwFT8&index=20&feature=plpp_video (kiss around 14:05, crap quality, will look for a better. There is also a heart-shaped mirror at 14:20, but it does nothing but reflect shots).
From my experience playing, she also blows a taunting kiss when she's laying one of her "Pandora's Boxes", while saying "Present time!". I have yet to find a video of it, but it does nothing; it just sounds like her normal kiss attack.