Talk:Guna (Valentine's)/@comment-75.64.83.236-20170222110742/@comment-26447088-20170222235837

If you mean it's not awakened yet (the text is faded), then it can only at the start of a quest (first wave). It's suggested that, once she's around 1000 loyalty, to enter a quest and exit and re-enter using continues to reroll the chance of it awakening.

If it's already awakened, then it'll activate as long as the enemy she's hitting is over 50% HP, and you'll see an increase in damage.