While I didn't manage to complete the full month's challenge of characters, here is the full set of completed entries from the event. Perhaps the rest will be completed someday?
01 - Rikki as Kumbhakarna 02 - Jayde as Ravana 03 - Faith as Nox 04 - Samantha as Thoth 05 - Lika as Pele 06 - Tachibana as Da'Ji 07 - Forest as Olorun 08 - Maven as Mulan 09 - Jay as Charybdis 10 - Eidolon as He-Bo 11 - Katie as Nu Wa 12 - Chris as Ganesha