Fusion

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Fusion menu in Persona 3 Reload.

Fusion is a central game mechanic in the Megami Tensei franchise. It involves combining two or more demons to create a new demon. In the Shin Megami Tensei games, fusion is generally performed by Mido in the Cathedral of Shadows or equivalent. In the Devil Summoner series, fusion is generally performed by Victor in the Goumaden. In the Persona series, fusion is generally performed by Igor and his assistants in the Velvet Room.

Mechanics by Game

Shin Megami Tensei series

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Last Bible series

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Last Bible Special

Fusion is performed using either the skill Comback or via Geber's Laboratory. Beast fusion becomes available either when Mattel learns the Comback skill or when the party reaches Dolurae. Fusion accidents and skill inheritance do not occur, and there are no special mechanics involved in fusion aside from the use of the group system in place of a demon's race.

Majin Tensei series

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Devil Summoner series

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Persona series

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Persona 4

Fusion occurs in the Velvet Room limo, accessible from the Central Shopping District or from the entrance of the TV World. The protagonist can fuse two - three Personas together and the resulting Persona is based on the levels and Arcana of the materials used. Like in other games, accidents can occur when fusing 2-3 Personas. Maxing out Social Links gives key items that enable fusion of certain higher level Personas. Fusing on certain days grants bonuses depending on what is on the Fusion Forecast. On July 12th, Igor gives the protagonist the ability to fuse four/five/six Personas together as well. Lastly, in New Game+, the protagonist can fuse Izanagi-no-Okami.

Persona 4 Golden

The protagonist can now fuse Aeon and Jester Personas for the new Social Links, and dates on the Fusion Forecast have been moved around.

Persona 5

Typical two-Persona fusion is unlocked in the Velvet Room partway through the first Palace. Fusion results are determined by the Arcana and level of the chosen Personas. The player is able to choose which skills are inherited, though some skills are unique to a particular Persona and some skills are impossible for a given Persona to inherit. For example, a Persona with Ice inheritance type will not be able to inherit Fire magic skills. In Persona 5 Royal, the Trait of a Persona can also be inherited by the fusion result, except for the traits of DLC Persona.

Group fusion of three or more Personas becomes available on reaching the Strength Confidant Rank 5, with recipes unlocking from reaching maximum rank with some Confidants, earning key items in Mementos missions, or progressing through the game. One group fusion result is only available in New Game+. The Velvet Room also eventually unlocks Persona itemization, which can give equipment or skill cards, and Persona strengthening via sacrifice of one Persona to provide experience and randomized inheritance of one of the sacrificed Persona's known skills. Late-game unlocks Network Fusion, which requires connection to the internet and in which once daily a standard fusion may be performed with one of the two Persona being provided by a randomized selection of other players' Personas. This can be a way to obtain skills or Traits not yet available to the player, or which are only obtained through Fusion Accidents or Fusion Alarms.

Devil Children series

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Devil Survivor series

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Fusion in the Devil Survivor series is done via the Cathedral of Shadows app, which allows the fusion of two demons. The resulting demon can inherit any of the appropriate skills from the materials into its empty skill slots and a small portion of their stats as bonus stats. Certain fusion-exclusive demons are tagged as "Unique", meaning the party cannot have more than one of them.

In Devil Survivor 2, the player can earn Add-ons by accumulating a certain amount of Macca Bonuses. These can be used in fusion to strengthen the resulting demon or change the skill inheritance process in different ways.

Nomenclature

Names in Other Languages

Language	Name	Meaning
Japanese	合体	Fusion

References

General

• "Chapter 1: Systems", Persona 4 The Golden: The Complete Guide, Dengeki Playstation Editorial Staff. Published by Kadokawa (2012). Japanese. p. 80. ISBN-13: 978-4048866637.

Specific