The nurse is one of the first npc in terraria, she will be in your house as soon as you have 100 health (just by grabbing a crystal heart).
Service:
She can heal you as long as you pay her, that's advantage or disadvantage (depends on you) for those who have low health, because of enemies or any bad potion they have taken, she also heals the other characters by throwing syringes when she is near.
Curiosities:
when there is a party, the nurse changes her hair
is the enemy of mechanics, they do not like each other.
