Follow-Up Attack (officially called Bonus Attack) is one of the counters towards enemies with Resolve. When a card with the awoken skill is in the team, matching a column of Heal Orbs will deal 1 bonus damage after your team attacks. The number of Heal orbs depends on the board size (since the length of a column changes); five orbs are required for a 6×5 board, while six orbs are required for a 7×6 board.
Note that you must match an exact column to activate this awakening; it cannot have extra matched hearts connected to it.
Examples of successful FUA
Examples of unsuccessful FUA
See also Super FUA for a variant of this.