Sulfurina

Sulfurina, or Ryu-san in Japanese, is the name of the embodiment of the Emerald Green Spring, a hot spring that emits a deadly poisonous gas consisting of hydrogen sulfide and sulfur dioxide. The group has to tread to retrieve sulfuric acid from the spring to make sulfanilamide to cure Ruri of her illness. Silver can be used to detect hydrogen sulfide to see where the poison gas is and to avoid it. She is not a real being but her illusionary representation has her looking like a beautiful goddess in long white dress, wavy, long emerald green hair with a flower crown on-top and big green eyes,...