Strider: Strider's are skilled gun users and make full advantage of the battlefield. While their movement range is average, they can attack enemies four to five panels ahead of them. Their defense is rather low, so they should be put in the back to avoid serious damage. Their abilities involve elemental shots as well as some guard stances.
Theurgist: These dark mages can recite several deadly curses to harm the enemies. Their attack and defense stats are below average, so placing them correctly is crucial. Be sure to use defense increasing items on them, so they can actually take a hit or two without fainting.
Medic: Medics are absolutely essential. Medics learn a lot of healing and supporting spells, so never go to war without a medic in your team. They've also got a surprisingly high defense, but their attacks are as strong as a Theurgists.
More to come...