Persona Q is a spinoff title in the Persona franchise. Developed as a joint collaboration between Atlus's Persona team and the Etrian Odyssey team. It takes place between Persona 3 and Persona 4, featuring the nearly complete cast of playable characters from each. In this game, each party member is available immediately and all have the Wild Card ability, which means they can use any Persona. However, you no longer have the ability to switch Personas mid-battle.
Persona Q has a sequel called Persona Q2 that was released November 28, 2018.