The Persona series features characters with firearms and melee weapons, with magic that comes from Personas. Personas can be fused in order to create more powerful Personas. In addition, the lunar phases are important.
The first game in the series centers around the protagonist and his classmates at St. Hermelin High School in Mikage-cho. Hidehiko Uesugi talks all of his friends into playing a game called "Persona", which is played much like the ritual game "Bloody Mary". While playing, the students lose consciousness and meet Philemon, who gives them the ability to summon reflections of their personalities, which are known as Personas.
Below are the characters on the site that cosplayers have depicted.