You have multiple "battle devices" and "drivers" to choose, each of them will grant you different skills and buffs (or debuffs), you can mix them up as much as you like!
Devices can vary from 2 to 5 driver slots!
Drivers go from level 1 to 5 and there are also special and secret drivers with unique bonuses!

You also have "boosters" special accesories that grant specific buffs to your character, more health, more force and many others!
The character stats are: Stamina (HP), Charge (PM), Force (Atk), Durability (Def), Range (M.Atk), Resistance (M.Def), Reload (Agi) and Reliability. (Luck)

Each character can carry 1 Device, 1 Main booster and 2 Secondary boosters.
You need to equip drivers in order to use skills, otherwise... nice meeting you.
There's an ELO ranking that will unlock new practice areas, shop items, and interactions with NPC's. To raise your ELO you must play the ranked mode in "The Box". (ELO applies for the whole party)