Of the many things that Persona 5 Royal has re-vamped from the original Persona 5, perhaps the most crucial one to keep track of is the new ruleset for persona fusions. Obviously, with the addition of two entirely new arcana, Atlus had to switch around which arcana combinations resulted in what, throwing out the old fusion table to bring in a new one. So, what are the new parameters that determine the result of a fusion?
Arcana
With the increase from 22 arcana to 24, the table that keeps track of almost 300 arcana combinations looks a little something like this:
The red boxes indicate impossible fusions, all coming from the Judgement arcana. Note that fusions with Treasure Demons follow an entirely different set of rules.
Level
The basic formula for determining which persona you’ll be getting has to do with the default level of the personae you’re fusing. Meaning, the actual level of the persona you’re using doesn’t matter as much as the level they start at naturally.
The formula looks something like:
- ((Default level + default level) / 2 ) + 1 or 0.5
Meaning that the average of the two personae’s level plus 1 (0.5 if the average has a decimal place and must be rounded up to the next whole number) is the lowest level the resulting persona can be. The game will choose a persona of that level or the next highest from the designated arcana as the result.
Take the first two Temperance arcana personae for example: Genbu at level 7, and Koppa Tengu at level 11.
If you fuse Cait Sith (Magician lvl. 5) and Silky (Priestess lvl. 6) together, you will get Genbu (Temperance lvl. 6) because:
- ((5 + 6) / 2) + 0.5 = 6
- (0.5 is added instead of 1 because the average is 5.5)
However, if you fuse Cait Sith with Asparas (Priestess lvl. 11), you will get a Koppa Tengu because:
- ((5 + 11) / 2) + 1 = 9
- (1 is added instead of 0.5 because the average doesn’t have a decimal place)
And Koppa Tengu is the Temperance persona of the next highest level after 9.
This rule holds even when there is an absurd distance between the formula number and the level of the resulting persona. For example, the average level of Arsene (Fool lvl. 1) and Hua Po (Hanged lvl. 9)rounded up is only 6, yet the resulting persona would be a level 37 Belphegor because it is the next highest level persona in the Tower arcana.
However, there is a slight tweak to the rule when you fuse two personae of the same arcana together, because both of the ingredient personae are on the same list that the game chooses the resulting persona from. The same formula still holds at first: for example, a Makami (Temperance lvl. 15) and a Genbu will result in a Koppa Tengu because:
- ((15 + 6) / 2) + 0.5 = 11
And Koppa Tengu is, itself, level 11. But a fusion between a Makami and a Koppa Tengu would look like this:
- ((15 + 11) / 2) + 1 = 14
And by this logic, should result in a Makami, as it is the next highest level persona at level 15. However, Makami is an ingredient persona in the fusion, and can’t just simply be fused back into itself: therefore, the result is Genbu because it is the next weakest persona after the one that would have been the result.
The only other time this addendum is in effect is when you have not yet unlocked the persona you’re trying to fuse. For example, even if you have the right ingredients to fuse Cybele (ultimate Priestess persona, lvl. 83), you will only get Scathach (Priestess lvl. 77) until you max out the Priestess confidant.
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