This is a list of all characters in Shin Megami Tensei IV.
- Flynn: An 18-year-old young man living in East Mikado. He is a member of the demon-exterminating samurais.
Guest Playable Characters
- Isabeau: The lone lady among the samurais, she is a veracious young woman with a strong mind.
- Jonathan: Gentle nature and of good upbringing, Jonathan acts as an intermediary between friends of individual samurais.
- Walter: A passionate young man with bad behavior.
- Nozomi: A friendly photographer and hunter. Certain Challenge Quests only.
- Lucifer: Chaos Route only.
- Merkabah: Law Route only.
- Navarre: He is highly energetic and has a strong sense of elitism.
- Hope: Leader and mentor to the East Mikado samurai.
- Hugo: Abbot of the Monastery with a fondness for wine
- K: Former Master Samurai, runs a Tavern in his retirement
- Masakado: Neutral Route only.
- Charon: Overworked ferryman of the river Styx
- Mido: Support AI in the Cathedral of Shadows app
- Issachar: Flynn's childhood friend
- Aquila: Mikado's first king
- Ahazuya Mikado: Mikado's current king
- Gabby: Influential nun with a mysterious past
- Hikaru: A strange girl who takes interest in Flynn's group
- Kaga: member of the Ring of Gaea
- Minako: member of the Ring of Gaea
- Fujiwara: Runs Cafe Florida in Shinjuku
- Skins: Former CDF member, now a Hunter
- Akira: Former CDF member
- Kiyoharu: Former CDF member
- Kenji: Former CDF member