One misstep is all it took. Edge had had a blast insulting Piastol- from a brief interlute in BtS to interfering with her fights to making an all around pain in the ass of himself, it had been a delight. Edge's misstep was planting his left foot at just the wrong angle. A twisted ankle. Nothing major, normally. It cost Edge some of his speed, which is all Piastol needed to catch him.
The first Tempest Dance literally split Edge in half, and the attack didn't stop. Piastol oblierated Edge's corpse, reducing it to tiny fragments. Oh, but the Guardian Angel wasn't done then. She then attacked the entire Final Fantasy 4 cast. It didn't take her long to slaughter everyone in front of her. Even the heroic Cecil and the saintly Rosa fell victim to the berserker fury that gripped Piastol. Piastol didn't stop with just the heroes- she threw herself at the fiends and Zeromus as well. Rubicant, the only one with the power to stop her, was killed in asingle hit by the water aligned Tempest Dance. DL police found Piastol, surrounded by over a dozen corpses and covered in blood, laughing at her revenge. Piastol was taken into 'protective custody', lest she hurt herself or someone else. This held her for at least a good 20 minutes, when Luca came in and slaughtered the guards and proposed to Piastol, as he was that impressed by her willingness to kill anything in her path.
This touched off another riot, with Piastol doing her best to slaughter Luca, and Luca returning the favor (as he assumed it was her way of saying yes to his proposal.) It took the combined efforts of Cidolfas Orlandu and Yuri Hyuga to put the two down, in a titanic battle for the ages. After that, it was decided to let Piastol spend a little quality time cooling off in a sealed hospital room, as her rampages of late had gotten out of hand. -No- one was willing to revive Piastol to fight Loki, considering that he had knocked her out with a cheap shot during the start of the season and her current mental state.
Loki just appreciated the free win. Like anyone with more self preservation than Edge Eblan (Most of the known universe), he didn't want to fight a berserker Angel of Death.