Party Tension During Battle. During battle, you can increase your Tension and Affinity (Party Gauge) by shouting encouragement to party members when their tension is low or when they land a critical hit. You can also help party members who are in bad condition or who are unable to fight. Your party members can also come to your own character's assistance when you are in a bind. Using 'Affinity Actions' during Battle can increase your Party Members' morale.
The Party Performs better in battle when their tension is high.