The Battle Enhancement Attribute Type (BEAT) System allows the player to choose party members' BEAT Bonus type. As combat experience increases, the team can achieve higher BEAT Ranks, which unlock advanced styles, known as Action Upgrades.
BEAT.S is a type of offense fighting style, which is actually a special Blind Sides technique. In effect, the team member forgoes defense and initiates multiple Blind Sides to confuse the enemy, then unleashes a flurry of highly damaging attacks.
BEAT.B is a type of defense fighting style, a special Rush mode power play style. The team member fights the enemy directly in front with special attacks. During this time, the member is almost invulnerable to enemy attacks.
BEAT.N is a neutral style of fighting as it doesn't upgrade any particular ability, but combines the stat enhancements from the other BEAT styles. This is often used as the default BEAT for a character and the player can change it at will.