Sub-Personas are a core mechanic, providing extra HP/SP, skills, and elemental resistances. Don't just equip them for stats; strategically choose Sub-Personas to cover your Main Persona's weaknesses or provide essential utility. For example, if your Main Persona is weak to Fire, equip a Sub-Persona that resists or nullifies Fire. Fuse Sub-Personas frequently to inherit powerful skills like 'Mind Charge', 'Power Charge', 'Mediarahan', or elemental boosts. Always register your strong Sub-Personas in the Compendium before fusing them away. Consider having dedicated Sub-Personas for exploration (e.g., with 'Chakra Walk' for SP recovery) and combat (e.g., with offensive boosts). The 'Skill Card' system also allows you to transfer specific skills to your Sub-Personas, offering even greater customization.
