Similarly to the "Chain Blast" Battle Action from Tales of Zestiria, this action allows the player to raise the upper limit of artes in a combo, but with a new effect of invoking a unique special action that differs depending on the character. Break Souls have between three to four tiers and are gained by leveling. When a character has three Souls or more, the player can expend one Soul to execute a Break Soul by pressing the button. Break Souls also have a variety of support abilities attached to them, and all playable characters' Soul Breaks restore their HP and BG. All Break Souls also give a Soul to any enemy nearby. Enemies are also capable of performing Break Souls with the same restrictions and effects, though they do not restore HP.
The following is a list of each playable character's Break Soul in the game:
- Velvet Crowe - Consuming Claw
- Laphicet - Divide Pain
- Rokurou Rangetsu - Vengeful Stance
- Magilou - Spell Absorber
- Eizen - Draconic Drive
- Eleanor Hume - Aerial Strike