KING's RAID Heroes take different positions (front/center/rear) during battles.
Heroes with melee attacks are placed in the front row, and they're placed in the following order: Knight > Warrior/Wizard > Assassin > Mechanic
If Heroes of similar Classes are in the same team, the Hero with higher DEF will be positioned in the front.
Heroes with ranged attacks are positioned in the center/rear area during battles, but the positions may be changed during battles depending on the Hero's ATK/Skill Range.
Even if the Hero is placed in the center, the Hero's position may be changed to the rear during battles if the Hero uses skills with long ATK/SKill Range.