VelvetCalc is an independent, fan-made set of fusion calculators for the Persona series: Persona 4 Golden (ready for Persona 4 Revival) and Persona 5 Royal. Everything runs in your browser.
Fusion rules and persona data are based on the public-domain megaten-fusion-tool project. We checked our calculators against its logic across more than 40,000 Persona 4 Golden and 49,000 Persona 5 Royal two-persona combinations, plus 2.5 million Persona 4 Golden triple fusions.
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