Fusion Theory in Megami Ibunroku Persona

This page is for explaining the Persona fusion in Megami Ibunroku Persona.
==Basics==
In order to create a Persona, the player must fuse Spell Cards acquired from demons via negotiation. The Order of the Spell Cards will determine the resulting Persona's Arcana (e.g Night x Fairy = Magician). The sequence in which the cards are fused is irrevelant, so both Snake x Drake and Drake x Snake will create a Persona of the Priestess Arcana. After that, the Persona itself is determined by the following formula:
{\frac{\text{(First demon's level} + \text{Second demon's level)}}{2}} + 3
The resulting Persona will always be of a higher level than the result of the equation. For example, if the result of the formula is 40, the resulting Persona will be at least level 41. The only exception to this rule is when the result of the formula is equal or higher than the level of the strongest Persona of that Arcana.
As a practical example, let's assume the player is going to fuse Sumizome (Fairy, level 40) and Orthrus (Beast, level 37). Their Orders will create a Priestess Persona, and the level formula results in 41, and so the resulting Persona will be Tensen Nyannyan (Priestess, level 46).
Spell Cards from bosses as well as demons belonging to the Karma, Meta and Fiend Orders cannot be acquired through natural means, only via the use of cheat codes. It's still possible to use them in fusion, but it's not recommended to do so. Enemies belonging to Orders that can't be normally obtained may freeze the game or worse.
The player may fuse a Persona that's at most 10 levels higher than the protagonist, but the Persona can only be equipped by a character with the same Persona Level as it. Until then, the Persona will stay in the Velvet Room stock.
==Fusion Colors and Accidents==
Each fuseable demon in the game belongs to one of four Types: Element, Force, Light, and Dark. In regular gameplay these Types help determine a demon's resistances and weaknesses (e.g Light demons being weak to Dark skills and vice-versa) but they also affect the outcome of the resulting Persona.
Fusions can be of three different colors: white, red, and blue. The color is determined by the affinity between the Spell Cards and it influences fusion accidents. The fusion colors may coexist with arrows if both conditions are met. The colors' effects are:
Color	Effect 	Cause
White	No extra effect.12.5% chance of a fusion accident. 	All other combinations.
Red 	No extra effect.25% chance of a fusion accident. 	Opposite Types(Element x Force; Light x Dark)
Blue 	Highest stat +5 and Magic Attack +20.16% chance of a fusion accident.	Same Type
The types of fusion accident are:
Effect 	Chance by Color	Chance by Color	Chance by Color
Effect 	White 	Red 	Blue
Change to a Persona of another Arcana. 	\frac{8}{256} 	\frac{8}{256} 	\frac{2}{256}
Change to a Persona of the Fool Arcana. 	\frac{1}{256} 	\frac{4}{256} 	\frac{2}{256}
All stats -5. 	\frac{7}{256} 	\frac{32}{256} 	\frac{0}{256}
All stats +2. 	\frac{8}{256} 	\frac{0}{256} 	\frac{8}{256}
Inherits a spell from one random parent.(Inheritable spells only and still obeys inheritance rules)	\frac{8}{256} 	\frac{20}{256} 	\frac{4}{256}
Fool Personas can only be created through fusion accidents. The following table is an addendum to the first accident type, "change to another Arcana." Once the 8/256 chance has been triggered, the Persona's Arcana will change according to those chances:
Arcana 	Chance
Lovers, Hermit, Temperance, Moon, Sun, World	\frac{32}{256}
Magician, Empress, Emperor, Justice 	\frac{10}{256}
Priestess, Hierophant, Chariot, Judgement 	\frac{6}{256}
==Fusion Arrows and Inheritance==
Some fusion combinations may also be represented by arrows, depending on the demon's species. Those arrows indicate that the resulting Persona may inherit a spell from one of its components. However, there are rules that govern which spells a Persona may inherit. The fusion arrows may coexist with colors if both conditions are met.
Arrow	Effect 	Cause
→ 	Skill inherited from first demon in the fusion. 	Compatible species.
↗ 	Skill inherited from second demon in the fusion.All stats +1 	Same species.
↘ 	Skill inherited from second demon in the fusion.All stats -1.	Incompatible species.
Let's assume the player will fuse a demon of the Yoma race with a demon of the Fairy Race. Yoma and Fairy belong to the Demons species, so the resulting Persona will have +1 to all of its stats and will inherit a skill from the second demon used in the fusion. Furthermore, Yoma and Fairy are both Element-type, which results in a blue fusion. In the end, the fusion result will be a Magician Persona with +6 to its highest stat, +20 magic attack, +1 to the remaining stats and will inherit a spell from the second card used in fusion.
The following table is an addendum representing the affinities between species.
Species	Compatible	Incompatible
Demons 	Animals 	Oni
Winged 	Birds 	Evil
Dragons	Oni 	Birds
Birds 	Winged 	Dragons
Animals	Demons 	Fouls
Oni 	Dragons 	Demons
Evil 	Fouls 	Winged
Fouls 	Evil 	Animals
Species	Orders
Demons 	Night, Yoma, Fairy
Winged 	Divine, Fallen
Dragons	Snake, Drake
Birds 	Flight, Raptor
Animals	Beast, Wilder
Oni 	Femme, Brute, Jirae, Jaki
Evil 	Haunt, Spirit, Grave
Fouls 	Foul
==Item Fusion==
After selecting the Persona to fuse, Igor will ask the player if they want to add an item to the fusion. Different types of item have different effects. For more specifics on the effect of items in fusion see the List of Megami Ibunroku Persona Items page.
Item Type 	Effect
Skill Tablets	Spell inheritance
Weapons 	Increase Strength
St Incense 	Increase Strength
Armor 	Increase Vitality
Vi Incense 	Increase Vitality
Gauntlets 	Increase Dexterity
Dx Incense 	Increase Dexterity
Sabatons 	Increase Agility
Ag Incense 	Increase Agility
Helmets 	Increase Luck
Lu Incense 	Increase Luck
Ammo 	Increase Magic Attack and Defense
HP Incense 	Increase Magic Attack and Defense
SP Incense 	Increase Magic Attack and Defense
Consumables 	Random effect
Firearms 	Random effect
Gemstones 	Change resulting Persona within Arcana
Totems 	Change resulting Persona
===Random Effect Fusion===
Caused by adding consumables to the fusion. When this happens, one of the following will happen:
:+3 to a random stat.
:-3 to a random stat.
:Spell inheritance.
The following table is an addendum representing the spells that can be inherited from Random Effect fusion. They change depending on the moon phase at the time of fusion and the chances of inheriting a spell in each category is the same. Those spells still follow the inheritance rules.
Moon Phase	Skills
NEW 	Dormina, Shibaboo, Pulinpa, Hapirma, Marin Karin, Makajam, Delyte, Slumpa, Poisma, Decover, Doroid, Quikka, Balzac, Mador, Wolvaan
1/8 	Agi, Agilao, Bufu, Bufula, Garu, Garula, Magna, Magnara
2/8 	Frei, Freila, Zan, Zanma, Gry, Gryva, Zio, Zionga
3/8 	Maragi, Maragion, Mabufu, Mabufula, Magaru, Magarula, Mamagna, Mamagnara, Megido, Megidola, Mazan, Mazanma, Magry, Magryva, Mazio, Mazionga
HALF 	Eiha, Baeiha, Mudo, Mudoon, Kouha, Baikouha, Hama, Hamaon, Dia, Diarama, Media, Mediarama, Liftoma, Alsanga
5/8 	Tarunda, Rakunda, Sukunda, Dekunda, Tarukaja, Rakukaja, Sukukaja, Makakaja, Dekaja, Tetraja, Makarakarn, Tetrakarn, Dia, Diarama, Media, Mediarama
6/8 	Agidyne, Bufudyne, Garudyne, Magdyne, Freidyne, Zandyne, Grydyne, Ziodyne
7/8 	Patra, Pen Patra, Posumudi, Paraladi, Petradi, Nervundi, Recarm, Alsanga
FULL 	Maragidyne, Mabufudyne, Magarudyne, Mamagdyne, Megidolaon, Mazandyne, Magrydyne, Maziodyne, Maeiha, Mamudo, Makouha, Mahama, Palarama, Nervma, Diarahan, Mediarahan
===Totem Fusion===
Adding a Totem to the fusion will change the resulting Persona. Each Totem is associated with a specific Persona and will change the fusion result to that one. For most Totems, the player just needs to add the totem to a fusion that would result into a Persona of the same Arcana as intended, but some of them require special fusions. For more information about Totems check the Totem page.
===Gemstone Fusion===
Using gemstones in fusion has a effect similar to fusing a Element race demon in the main Shin Megami Tensei series or a Treasure Demon in Persona 5. It allows the player to create a Persona of a higher of lower level than what the cards would normally create.
Gem 	Order -2 	Order -1 	Order +1 	Order +2
Alexandrite	Chariot 	Hierophant, World 	Magician, Priestess,Hermit, Justice 	Emperor, Judgement
Diamond 	None 	Lovers, Fool 	Priestess, Empress,Hermit, Sun 	Magician,Hierophant, World
Sapphire 	Justice 	Magician, Chariot 	Empress, Emperor, Lovers,Sun, Judgement, Fool 	Priestess
Emerald 	None 	Priestess 	Magician, Emperor,Hierophant, Judgement, World 	Empress, Chariot,Justice, Sun
Ruby 	Justice 	Empress,Hermit, Sun 	Priestess, Hierophant,Lovers, World, Fool 	Emperor, Judgement
Pearl 	None 	Magician,Emperor, Judgement 	Empress, Lovers, Chariot,Hermit, Sun, Fool 	Hierophant, World
Tanzanite 	None 	Priestess, Hierophant,Justice, World	Magician, Emperor, Lovers,Chariot, Judgement, Fool	None
Opal 	None 	Empress, Lovers,Sun, Fool 	Priestess, Hierophant,Hermit, World 	Chariot, Justice
Amethyst 	Magician 	Emperor,Chariot, Judgement 	Empress, Lovers,Hermit, Sun, Fool 	None
Garnet 	Priestess 	Hierophant, World 	Emperor, Chariot,Hermit, Justice, Judgement 	Magician
Aquamarine 	Magician,Emperor, Sun 	Lovers,Hermit, Fool 	Hierophant,Justice, World 	Priestess
Topaz 	Priestess, Sun 	Justice 	Lovers, Chariot 	Empress, Emperor,Judgement, World
Moonstone 	Empress,Sun, World 	Magician, Justice 	Chariot 	Emperor,Hierophant, Judgement
Malachite 	Emperor, Judgement 	Priestess, Hermit 	Justice, Fool 	Magician,Hierophant, World
Onyx 	Hierophant,Chariot, World	Empress, Sun 	Lovers,Hermit, Fool 	Priestess
Turquoise 	None 	Emperor,Justice, Judgement 	Magician 	Empress,Chariot, Sun
For example, should the player attempt to fuse Dark Elf and Hannya, the following will happen: their races are Fairy and Brute, which results in a Persona of the Hierophant Arcana. The Hierophant Personas in the game are:
Yama (4) °
Aizen Myouou (6)
Shouki (17)
Ogma (25)
Take-Mikazuchi (39)
Thor (52)
Fuhedi Mergane (74) °
Indra (89) °
The ° symbol indicates a Persona that can only be fused with a Totem.
That specific fusion would normally create Ogma. The gemtones that influence the Hierophant Arcana and their effects are:
:Diamond, Pearn, Moonstone, or Malachite (Order +2): Resulting Persona will change into Thor.
:Emerald, Ruby, Opal, or Aquamarine (Order +1): Resulting Persona will change into Take-Mikazuchi.
:Alexandrite, Tanzanite, or Garnet (Order -1): Resulting Persona will change into Shouki.
:Onyx (Order -2): Resulting Persona will change into Aizen Myouou.
==Unknown Power==
Unknown Powers are passive abilities that activate when a Persona-user is in low health. They are acquired by fusing demons of specific races under certain moon phases. In order for an Unknown Power to activate, the Persona must have Best Affinity with its user and be at least Rank 6.
For more information on Unknown Powers check the Unknown Power page.
==Inheritance Rules==
A Persona's type and subtype determine which spells it cannot learn. For more information on that check the Type and Subtype page. Personas may inherit spells through many ways:
:Arrow fusion
:Fusion accident
:Random effect fusion
:Skill tablet fusion
A Persona can only inherit one spell via fusion and in cases where a Persona can inherit a spell through more than one way, spells inherited through adding an item (random effect and skill tablet) take priority over spells coming from the demons themselves (accident and arrow fusion). Inherited spells are always learned at Rank 2.
A Persona cannot inherit a spell it already knows. Using a skill tablet on a Persona that cannot learn that spell (either because it already knows it or can't inherit it) is a waste with no benefit at all. During random effect fusion, it's possible for the spell randomly chosen to be one the Persona cannot inherit, which will also result in nothing.
When it comes to accidents and arrow fusion, the spells are inherited from the ingredient demons. Demons may have from zero to three inheritable spells. If a demon has inheritable spells, those will be listed first in their skill list. The order is not arbitrary as the demon will try to pass the first spell to the resulting Persona. If the Persona can't learn the spell, it'll move on to the second spell and so on.
Category:Persona