Mine are:

Percy: Ariel (shallowly because of his ability of water)
Annabeth: Belle (smart and carefully judges which reminds me of Annabeth)
Nico: Hiro Hamada (Both lost their siblings which made them thirsty for revenge until stopped by friends)
Leo:Elsa (Don't judge, but both had tried not using their powers, had regret for what they did with their powers to loved ones and they run away from their problems)
Jason: Hercules (Both had tried hard to get approval and to find out who they really are)