Collect Skill Points to raise your Lv. Each Lv up grants a Skill Bonus, which allows you to learn Skills or increase a Skill's ★ Rank.
Skill Points can be earned by defeating enemies or meeting certain conditions.
When the battle ends, the Skill Bonus Lv. resets.
In some battles, you may start a wave with a set amount of Skill Points, increasing the Skill Bonus Lv.