The Grand Grimoire regards Nebiros as the field marshal and inspector general of the armies of Hell along with being one of the six great officers. He can be conjured to inflict woes upon anyone, discover the Hand of Glory, teach the mystic and occult qualities of all animals, plants and minerals and supply necromantic advice. One of the three Goetic nobles under his direct authority (the other two being Glasya-Labolas and Ayperos) is Naberius, the 24th demonic spirit of the Ars Goetia, suggesting that the Grand Grimoire's author understood the two spellings to signify distinct demons. Naberius is sometimes associated with the three headed Greek monster Cerberus.
Nebiros appears as a necromancer who, along with a horde of Zombies, invade the protagonist's shelter. After his defeat, the protagonist receives the Fire Talisman from his friend's girlfriend, Hiroko.
Shin Megami Tensei[]
"Origin: Africa. The general of Hell. He oversees demons. He has knowledge of ores, plants, and animals, and can forsee the future. He is the most skilled soul controller in all of Hell."
—Shin Megami Tensei A-Mode DDS dictionary
Nebiros appears as Count Black, a demon who has imprisoned countless souls into beings known as the Bodyconians in an attempt to create a false paradise for his and Count Red's adoptive daughter, Alice in Roppongi. Nebiros has imprisoned the girlfriend of the Law Hero as a Bodyconian who can be put to rest with a Balm of Life. After the party defeats Belial, which causes Alice to disappear, Count Black will confront the party a few steps as they leave the room. In anger on what had happened, he steals the body and soul of the Law Hero and causes demons to roam inside the building of Roppongi, with reveals that the people living there are actually undead corpses. When the party finally confronts him in his room, he transforms into Nebiros to fight them but is ultimately defeated, which causes all of the corpses and the barrier in Roppongi to disappear.
Shin Megami Tensei: Strange Journey Redux[]
Nebiros is one of the four bonus bosses found in the Empyrean Ascent on a New Game Plus. Defeating him bestows the Lucifer Gun (160 AT, hits all, 1 hit; Final Seven skill).
In a similar vein to Maya, Nebiros instantly kills anyone that hits him with a Physical attack. This instant kill effect can be shaken off with Endure. While he does start the battle weak to Gun, at the end of the turn where his weakness is exploited, he will change his weakness and also obscure his elemental affinities. The only constant is that he will always be immune to Expel and Curse, and always drain Ice. For the first half of the battle, Nebiros will preferably use Mabufudyne to assault the party; if any members are known to repel Ice, he will instead spam Calamity Cycle nonstop.
Once he hits half health, he will break out Zero Morality, which inflicts Rage on the party with a high accuracy rate. This can have disastrous consequences, as Rage-afflicted members will use only use Physical attacks and walk right into his instant kill effect. Bring out demons with general ailment immunity to counter this, or keep the Braveheart command skill active to block the incoming ailments.
Like the others, Nebiros will start spamming Doomsday once the battle's gone on for 20 or more turns.
"The general of Hell. He keeps watch over other demons. One of hell's greatest necromancers, he can control souls and corpses."
—Shin Megami Tensei IV Apocalypse compendium
Nebiros appears in Shinjuku in the east entrance main street, Nicho, Kabuki-Cho passage, Kabuki-Cho and the Golden Gai areas. He can teach the Mudoon and Megido skills through his Demon Whisper. Nebiros benefits from learning Darkness and Almighty skills.
Shin Megami Tensei V[]
"The general of Hell. He keeps watch over other demons. One of Hell's greatest necromancers, he can control souls and corpses."
—Shin Megami Tensei V lore
Nebiros can be found in the Taito area of Da'at as an infrequent enemy. When it spots the protagonist, Nebiros will summon a swarm of Decarabia to attack while turning tail and fleeing. Nebiros can also be encountered in the Temple of Eternity as part of a random encounter group.
When the Empyrean opens, in the "Rebuild Tokyo" route, a Nebiros can be found inside, and if spoken to by the protagonist, will direct them to Belial, who gives "The Red Dragon's Invitation". If the protagonist's prior dialogue choices didn't largely match his final route-locking decision, this Nebiros will charge him 666,000 Macca to initiate this quest. If the protagonist takes Michael's quest "The Seraph's Return", this Nebiros will prevent them from absorbing Belial, aware of their power to fuse demons.
Devil Summoner: Raidou Kuzunoha vs. The Soulless Army[]
Nebiros appears as a boss in Dark Kasumidai during Episode 5. After Tae Asakura and her military contact are drawn into the Dark Realm, Nebiros will reveal himself to Raidou once all of the pages Sadakichi's report are found. While he came to kill the deserter before he can leak any information on the Super Soldier Project, he opts to attack Raidou as well.
Nebiros is also required to unlock the hidden demon, Alice. To do this, he must be in the party to answer the phone at Harumi-Cho after Belial has answered it in Tsukudo-Cho. Then, both must answer the phone at Ginza-Cho, summoning Alice and engaging her in battle. Following her defeat, both will imprison Alice's weakened form in a Staff of Death, asking Raidou to revive her through fusion at the Gouma-Den.
Persona 3[]
"The general of Hell, he keeps watch over other demons. One of the greatest necromancers in Hell, he can control souls and corpses."
—Persona 3 compendium
Nebiros is a Persona of the Hermit Arcana. His fusion prerequisite requires that the protagonist be level 50 and have the Marionette key item. As the request that grants the Marionette isn't available until special fusions can be performed, Nebiros cannot be fused until after 9/21.
Persona 4[]
By fusing Belial and Nebiros, the protagonist gets the Persona Alice in reference of their role in Shin Megami Tensei.
Persona 5[]
"The general of Hell. He keeps watch over other demons. One of Hell's greatest necromancers, he can control souls and corpses."
—Persona 5 background
Nebiros is the seventh Persona of the Devil Arcana and can be found as a Shadow in Niijima's Palace and in the Depths of Mementos, with the title "Wandering Reviver." He is the first of two Personas to learn the Curse Amp skill and the second of two that learn Evade Bless. Nebiros is the first Persona to learn the Megidolaon skill. When itemized through Electric Chair execution in the Velvet Room, Nebiros yields an Eigaonskill card. Nebiros, together with Belial, is once again one of the Personas needed to summon Alice through fusion.
Nebiros will initially appear as a boss encounter near the end of the dice game area of Niijima's Palace. He will make heavy use of the Brain Jack skill to Brainwash the party, potentially killing the protagonist should those afflicted focus the entirety of their attention on him.
Royal[]
Nebiros has been moved to Maruki's Palace and can also appear as a Disaster Shadow. Nebiros has been buffed from level 62 to 74, he now resists Curse skills and is immune to Psychokinesis skills, and all of his skills except for Marin Karin and Megidolaon have been replaced. When itemized through Electric Chair execution, Nebiros will now yield a Marin Karin Skill Card. During a fusion alarm, Nebiros will yield a Brain Jack Skill Card instead.
Strikers[]
Nebiros returns as the ultimate Persona of the Devil Arcana. He appears as a common enemy in the Jail of the Abyss. A particularly powerful Nebiros can also be found in the Okinawa Jail.
Devil Survivor Overclocked[]
Nebiros appears in the Fifth Day at Kudanshita as an optional boss in the event Marquis of Hell. He claims to have appeared on behalf of his master, seeking "the human Bel." He will summon teams led by Badb Cathas, Abbadon and Mothmen, who will heal him when wounded and crowd around him, preventing enemy teams from reaching him. Once defeated, he leaves, acknowledging the party's power and commenting that his master will be pleased. He appears as a member of the Fiend Race in this game.
Devil Survivor 2[]
"The general of Hell. He keeps watch over other demons. One of the Hells greatest necromancers, he can control souls and corpses."
—Devil Survivor 2 compendium
Nebiros appears as a bonus boss on the 3rd Day, but must be unlocked for 30 points.
During the first battle with him, the protagonist needs to escort civilians out of the map, as he enters the field with three demon teams. However, as the party defeats those teams, Nebiros will use Necromancy to constantly revive them at full health (Necromancy resurrects up to all three) whenever his turn comes around.
Furthermore, if Nebiros is defeated while another demon team is present, he can simply reincarnate by taking over that team's body and reappearing at full health, now accompanied by two Pisacas. Thus, the party either has to mobilize all 4 teams to efficiently defeat him, or make use of the Kishins' Double Up/Matchless Racial Skills.
Defeating Nebiros causes him to retreat, earning the player the Nebiros Repeller title and unlocking the fight with Belial on the 5th Day.
During the fight with Alice, Nebiros appears alongside Belial. Like the previous fight, Nebiros will revive defeated demon teams and reincarnate himself if defeated while any loose team is present. He also has his Ice and Electricity affinities improved, along with being buffed to Level 91.
In spite of Nebiros' status in the demonic hierarchy and his mid-major role as a secret boss, he is not a unique demon, allowing the party to have multiple Nebiros demons on their team.