IEvery character you recruit belongs in one of the following classes:

Defenders are tanks who shield allies.
Warriors are good in both of offense and defense.
Casters have long-range attacks, damage multiple enemies and boost allies.
Vanguards are agile attackers and can quickly eliminating foes.
Medics are healers  and support allies to keep them fighting.
Snipers use long-range shots to weaken enemies from afar.