Percy
The tunnel reminded him, rather unfortunately, of the sewers the Kekrops had lead them through under Athens. It was also like a watered down, less poisonous version of Tartarus. The tunnel had taken on the burning, hazy quality he remembered falling through right before they had fallen into the River Cocytus. Percy ruthlessly shoved the memories back, forcing himself to stay focused on Annabeth. He tuned out Nico muttering information on Kampe to the clueless, and nearly defenseless, Avengers. Percy cursed his own stupidity. In his recklessness he brought unarmed, unprepared mortals into a fight against one of the most terrifying and formidable monsters of his world. But there was no way he would turn back, no way he could. Annabeth was waiting for them at the other end of this tunnel and nothing was going to stop him from getting her out of the hell he'd left her in since the end of the Giant War. He turned around to face the others, his hand drawing Riptide out of his pocket, and flicking off the pen cap. He ignored the wide-eyed wonder of the Avengers seeing his sword transform.
"Nico and I will worry about Kampe. Whatever you do, DO NOT interfere. You'll just get yourself or one of us killed. Focus on rescue, and move quickly." He ordered. Steve looked like he was going to argue but Percy was already moving ahead.
By the gods, Annabeth was coming home.