HP values are influenced by multiple factors: * Taking damage from enemy attacks * Taking damage from status effects (Blaze, Shock, and Time Bomb) * Being healed by various support arts. * Being healed by an ally prepared with a support Soul Voice. Each character has a fixed base HP value. Enemies also have HP, which must be lowered to zero for them to be defeated, except in the case of some bosses, where the HP that must be taken away varies.