Belladonna

Belladonna is a pureblood Yuan-Ti who is one of the members of the shadowy organization, The Hand. She is a pupil of Theseroh (The Alchemist) alongside her two allies, perhaps even friends, Gideon and Eyphah. 
Belladonna is a master of poisons, manipulation, and illusion. Using both magic and flora to accomplish her means of infiltration, espionage, and torture.