Immunity is when someone is not affected by an element or a type of attack.
Throughout the series, Percy is shown to be immune to water- being able to breath in it and not getting wet unless he wants to. Cyclopses are shown to be immune to fire.
Leo is shown to immune to fire. Jason is shown to be immune to lightning, however while he is not harmed by it he can still feel pain.
Magnus is immune to extreme temperatures for a time. Children of Loki are immune to their parent’s control if they make their shapeshifting their own. Due to his lack of hearing Hearthstone is immune to sound based attacks.
- Percy Jackson (water)
- Cyclopses (fire)
- Jason Grace (electricity; can still feel pain)
- Leo Valdez (fire)
- Magnus Chase (extreme temperatures)
- Frey (extreme temperatures; limited)
- Samirah al-Abbas (commands from Loki)
- Alex Fierro (commands from Loki)
- Hearthstone (sound based attacks)
- Tyson (Poison and Fire)