Hey Legion! (Patreon)

Because I've been so down, I'm going to run an event to cheer up! :D

The event is simple. First person to guess the theme for December gets to name a character for me to draw.

Some hints:
-The characters scheduled to appear in series for December are named: Jessie, Bastilla, and Felicia.
- The theme is very meta.
-The theme has nothing whatsoever to do with the month, or any holiday.

Go ye forth and happy sleuthing!

UPDATE: Riddle solved. Must make them harder next time...