Cerberus

Appearances

 * Devil Children: Black Book
 * Devil Summoner: Raidou Kuzunoha vs. The Soulless Army: Pyro Class
 * Digital Devil Saga: Avatar Tuner: Atma Avatar
 * Digital Devil Story: Megami Tensei: Nakajima's demon familiar
 * Digital Devil Story: Warrior of the Demon City: Nakajima's demon familiar
 * Persona 2: Eternal Punishment: Fortune Arcana
 * Persona 3: Strength Arcana
 * Persona 3: FES:Strength Arcana
 * Persona 4: Hierophant Arcana
 * Megami Tensei
 * Shin Megami Tensei: Majuu Race
 * Shin Megami Tensei II: Majuu Race
 * Shin Megami Tensei III: Nocturne: Beast Race

Devil Children: Black Book
Cerberus appears in Devil Children: Black Book as Cool, the demon companion to Setsuna Kai. Cool appears when Setsuna uses a Devil Riser to attempt to save his brother from Jack Frost.

Digital Devil Saga: Avatar Tuner
Cerberus is the Atma Avatar of Lupa, the leader of the wolves. He serves as a boss fight in the Samsara Waterways.

Megami Tensei
Cerberus appears in Megami Tensei to help Nakajima Akemi fight back against Loki

Shin Megami Tensei
The protagonist's dog, Pascal, becomes a Cerberus after fusing itself with a demon. It aids it's master in one battle before disappearing through a teleporter. The Pascal cerberus recognizes it's old master later in the game and rejoins him.

Shin Megami Tensei Nocturne
Cerberus first appears at the Burial Chamber in the Amala Labyrinth's First Kalpa, where it will challenge you to prove your worth as a demon by quickly vanquishing once more those that you have once killed in the Vortex Word using the Black Visor. After meeting all the requirements and starting a new cycle, meeting with Cerberus again in the same location will have him take you to his master's resting place instead at the Tomb of Yomi in the hidden 666th floor, where you will receive an extra Press Turn.

Cerberus can also be encountered and recruited at the Diet Building.

Persona 3
Cerberus appears in Persona 3 as Koromaru's initial Persona. It is a death and fire elemental Persona.

Persona 4
Cerberus is a Persona of the Hierophant Arcana, usable by the Protagonist once he reaches the adequate experience level.

Shin Megami Tensei: IMAGINE
Cerberus is the 2nd demon you acquire although in an injured state passed down from DB Kuroe after witnessing her death and treating Cerberus's wounds. He then insists on following you on your journeys as a fledgling DB, but is again taken to heal fully by Snakeman after Act 3. After reaching level 30, you can regain him again as an ally at full health.