As there is no info on the skills of your leader when starting the game, here it is.
Jesse Bell ; Double Dose
*Attack along with an adjacent squadmate (ATK based)*
- Poor for PVP; Best at Raids when alongside an Epic Savage
Alvin 'Dutch' Sharper ; Collateral Damage
*Deal Heavy AGI-based damage to all enemies (AGI-based)*
- Best for PVP; Poor at Raids
Kennedy Elliot ; Blast Wave
*Attack three enemies (ATK based)*
Cmdr. Brodey ; Full Auto
*Deal Massive Damage to one enemy (ATK based)*
- Okay for PVP; Best at Raids
Jade ; Twin Slashes
*Deal Heavy Damage to one enemy (WIS based)*
- Okay for PVP; Best at Raids; Potentially the best leader once leader-skills are added due to having the highest WIS and second highest AGI
Mean Mary ; No Man's Land
*Focus attacks on the front line (ATK based)*
- Mean to players that pick her, sucks
Duke Masterson ; No Time to Bleed
*Restore a fixed amount of HP to adjacent squadmates (WIS based)*
Mac 'Boomstick' ; Overkill
*Do damage and sometimes paralyze foe (WIS based)*
- The only thing that he overkills is his usefulness, sucks