Much like the Maiden in Black from Demon's Souls, the Emerald Herald serves as the player's means of leveling up, replacing the bonfires of Dark Souls in this respect.

She gives the player an Estus Flask upon introducing herself. Bringing her Estus Flask Shards will increase the total amount of charges that the Flask can hold.

She gives the player the Aged Feather when spoken to upon arrival in Dragon Aerie.