FOOLISH MORTAL! You're in my bubble.
Start in Aldebaran!
All you need to do is walk near Deviling and ask him what is wrong.
How to talk to Deviling : You need to walk near him and be in range to trigger his dialogue. One person at a time can trigger the dialogue at a time.
After that, talk to the Delightful Angeling next and she tells us we need to find what other people do for Valentines day.
Off we go to meet a couple in Al De Baran. Here we meet Boies Rjerks and Nukooties Foreme. Talk to them and then go back to Deviling .
Here, we pick what Deviling will do/get with Angeling. You only need to do one to get the hat.
After completing one or all of the above talk to Deviling he gives you your reward!
Named Costume Sweet Chocolate. (Not Tradeable)
If you are VIP this also counts as your quest to get unfrozen shadow gear from Quen.