Yu Ying

Member of the Yu Clan and Serpentine. Yu Ying is an expert in poisons and the Yu Clan liasion that acts as Vic'tel's handler.

She is on relatively friendly terms with her cousin, Yu Huang, and appears to be the favorite cousin of Yu Atsushi. 

Yu Ying has a snake familiar, Ai Yao, that takes the form of a tattoo on her arm when unsummoned. Unlike most familiars, this snake is capable of attacking, and holds a potent venom.