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Soul can increase his maximum HP with Memory Flowers, temporary medicine effects and equipped accessories. These methods have different durations: a permanent increase from a completed flower stays with the character, while a medicine buff or an accessory bonus depends on that effect remaining active.

Permanent increases from Memory Flowers

Collect a whole Memory Flower or enough fragments to complete one to permanently increase Soul's HP. Flowers and fragments can be found during exploration and can also be quest rewards. A fragment is part of a completed upgrade rather than a separate full flower.

Check side paths and quest rewards while progressing through a region. This makes exploration useful even when the main route is already open. Keep looking for the remaining fragments when a flower is incomplete.

Medicine and accessory bonuses

An item that improves healing is not automatically a maximum-HP upgrade. Compare its effect text before changing a loadout: restoring more HP, raising maximum HP and reducing incoming damage are different benefits.

Preparing for a difficult encounter

Equip the intended HP accessory before entering the fight and keep it equipped while relying on its bonus. Use medicine with the required effect rather than assuming every healing item increases maximum HP. A larger health pool can provide more room to recover from mistakes, but blocking, dodging and managing the Sha-Chi System remain part of surviving the encounter.