Essence ofATLUS

You gain a free age and appearance change to whatever you want. You may also become any humanoid race from ATLUS series.

You gain a near endless amount of enthusiasm and willpower, able to push through hardship where most people would give up and break.

You gain a body that's at least peak human (or whatever your race is) in all ways possible and are able to fight against a variety of beasts and monsters.

You have incredible charisma and leadership skill. You find it really easy to act as a party leader, coordinating with allies, cover one another's weaknesses, and enhance their strengths, and so on.

You become an excellent explorer with a wealth of related skills, such as how to set camps and cartography.

You have great luck in finding treasure or useful materials, with it happening easier and more often than normal.

You have a highly developed sense of danger, easily feeling traps or powerful beasts and increasing in intensity the nearer the danger is.

You have the training of a skilled soldier and know how to use a variety of guns.

You gain an almost encyclopedic wealth of knowledge of mythology and folklore.

You can enter cognitive spaces like the Dark Hour, TV World, and Mementos without outside help.

You have access to ATLUS's magic systems (Shin Megami Tensei, Metaphor ReFantazio, etc.) and gain a high level of talent for magic, specially so for summoning. You also have learned basic spells like Agi, Dia, etc.

Even without summoning, you can recruit various demon or supernatural entities through a variety of means, such as negotiation, beating them into submission, bribing them, asking/answering questions, and so on. Different demons/entities vary on how they respond to each manner of recruitment, so be careful. Note that a demon could always just run off on you after taking a bribe, so remember them so you can beat them up later.

You have access to the Cathedral of Shadows, allowing you to fuse demons together among other its other functions. It also holds the Demon Auction, in which you can use the demons' mercenary nature to directly recruit them by bidding for their contract, skipping hard negotiations or fights.

You also have access to the Laplace and Nicaea services.

You gain one or more Etrian Odyssey classes of your choice (Landskneckts, Dancer, Ninja, Alchemists, etc.), gaining basic training and enormous talent/potential for their skillsets.

You gain a fusion of the social systems in ATLUS games (Social Link, Confidant, FATE, Follower, Synergy, etc.) alongside incredibly talent in making friends and forming strong bonds with others. As your bonds with others grow, this also grants other benefits (for either you, them, or both), such as gaining skills, resistances or stat boots, allowing them to awaken Archetypes, unlocking demons for you to fuse, and so on.

You gain the Skill Crack ability, allowing you to copy and learn skills from enemies you defeat. Racial skills and the like cannot be copied. This requires choosing the skill and an opponent that has it before battle start, and you (or a subordinate demon) must defeat that enemy. If someone else defeats the chosen enemy, you lose your chance at obtained the ability. Cracked skills may be passed to an ally if you want instead of taking it for yourself. With enough preparation and research and help, you could in theory upgrade the Demon Summoning Program to Skill Crack aspects of the universe itself.

You gain a Persona, a manifestation of your subconscious. By default your Persona is of the Fool Arcana, but can potentially be of different Arcana. You can summon your Persona in the real world unaided, but it's easier on cognitive spaces. This also enhances your physical ability to a degree.

You have awakened an Origin Archetype of your choice (Seeker, etc.), allowing you to transform into it. As you grow and develop your Archetype, it may eventually evolve into Adept and Elite Archetypes in its lineage, before finally achieving a Royal Archetype unique to you, be it a special one like Prince or a Royal version of an Origin Archetype.

You gain enormous skill in various medical disciples, such as surgery, diagnosis, and so on. You also gain the Healing Touch ability.

Optionally, you gain the Wild Card ability, allowing you to have/contract multiple Personas and switch between them. This also grants you access to the Velvet Room and its services, unless you don't want that.

Optionally, you become a Nahobino with a Demon of your choice.

Optionally, you gain and merge with a Magatama, becoming a demonic hybrid similar to the Demi-Fiend.

Optionally, you become a Messiah and gain the Power of Observation.

Optionally, you may have one or more Yggdrasil Labyrinths appear in whatever world you are in (including self-insert, world merge, etc.).

You may gain any ATLUS (SMT, Persona, etc.) characters of your choice as companions (including collab characters such as Dante). You will quickly grow a bond with them. You may choose what relationships you will develop with each of these companions (romance, friendship, etc.). This can resurrect the chosen companions if relevant, which may draw attention. If relevant (self-insert into their world, world merge, etc.), you are guaranteed to meet these companions in-universe.

Optionally, you may Self-Insert into any ATLUS series (Shin Megami Tensei, Persona, Etrian Odyssey, Metaphor ReFantazio, etc.), a variant (fanfics, etc.), or any setting with official crossovers with ATLUS series (Devil May Cry, etc.). You may choose when, where, and what world. The specifics are up you; maybe you get dropped in (default), maybe you insert yourself into or replace a certain character, maybe you get reincarnated, maybe you get merged with a local counterpart of yourself, etc.