Percy
Percy was exhausted he'd just had a terrible fall; almost fell into a fiery pit of doom and now he and Annabeth had been captured by a bunch of orange haired trolls. Percy was still weak so was Annabeth. She'd had been fighting off the trolls for at least an hour before they captured her. Percy had to fiqure out a way to get free and defeat the trolls. He remembered his battle with The Golden Boy on the Argo II. He'd won the battle with his quick wits.
Nico
Nico felt a sense of responsibility to lead the seven to The House of Hades and close the doors. Leo had set the Argo II on route to Camp Half Blood. Nico heard from Jason that the Romans were attacking his camp. Nico was never actually close to any of the campers at Camp Half Blood but he still felt like it was his home. Nico was worried that Chiron might beat Nico into a pulp for letting Percy and Annabeth fall into Tartarus, but he knew all Chiron would do is hold back his tears and act responsible that's exactly what Nico had to do also.
