Class Change

Each character has a unique class, and there are generic classes that can be freely set in two slots.

By training up classes, new ones will be unlocked.

Skill Tree

Every class has a skill tree. Use the money accumulated in battle to unlock your desired skills.
Passive skills can be set even when changing classes.

Character Hiring

You can hire generic characters to gain an advantage in battles.

Different types also affect status, so make careful judgments.