Revlis became part Succubus after making a pact with the dark god Babylon. This granted her wings with 30 feet of flight in exchange for sacrificing her pet dog Daiyo.
Umi's player, Ironmouse, at certain times speak Spanish and mentioned that she is a Puerto Rican. Because of it, Arcadum decided to make Aquan (a Triton's main language) canonically Spanish.
Madeleine is a Wood Elf Swashbuckler Rogue who acts as a masked hero named Le Petite Guardian.
Because Ironmouse often needs to leave for short moments to take her medicines, Umi is sometimes left alone during these moments. The in-universe explanation is that Umi is narcoleptic and will fall asleep at random intervals.
Terryn Zabi Is a Changeling Warlock of a Great Old One later revealed to be Wode.