Melancholy Medicine

Japanese name:	メディスン・メランコリー
Nickname:	Medicin Melancory

Medicine Melancholy is a doll youkai that lives on Nameless Hill surrounded by poisonous suzuran (lily of the valley) flowers. In Medicine's first appearance, Phantasmagoria of Flower View, she attacks the player with suzuran's poison for no apparent reason other than because they happened to be in her field. Because some of her attacks create clouds of poison in the player's side of the field which slow the player's movements and make dodging difficult she can be a very troublesome opponent to those that don't take care while near poison. Though supposedly not especially powerful or experienced among youkai, the fact that the right poison can affect even very strong people (or large numbers of people at once) makes her someone best avoided.

Touhou Wikia