Passives are extra abilities a unit is capable of learning after defeating a certain number of monsters. Some abilities are always active, such as stat increasing abilities, while others activate under certain conditions. A maximum of five abilities are available for units, typically depending on the unit's rarity.
In battle, when a passive is almost unlocked, the screen will zoom-in on the character, and a small light bulb will appear above their head. This may happen at several intervals before the ability is unlocked to alert the player of their progress. Once the required kill count has been reached, a screen will appear at the end of battle announcing the passive has been unlocked.
Certain types of gear also have passives they grant to any unit that equips them. These abilities do not need to be unlocked with kill counts.
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