Marie and Theodore, the other two Velvet Room residents, make their trailer debut for PersonaQ: Shadow of the Labyrinth.
Theodore was first introduced in Persona 3 Portable and is the youngest of the three Velvet Room siblings (the other two being middle child Elizabeth and eldest Margaret). As such, he tends to be picked on and slightly bullied by his sisters. Marie was introduced in Persona 4 Golden as a mysterious and amnesiac person picked up by Margaret and made into a Velvet Room resident.
Both trailers can be viewed below.