Coldblood Thirteen

Appearance
He wears a black cloak and wears a black masks with the number Thirteen on it

Personality
As mentioned in the title he is cruel and coldblooded, he often uses humans for experiments and most of them die

Plot
He is a member of the Coldblood Organisation. He also is a Alchemist and often uses humans for experiments.

He found out that Ye Lang has a body immune to poison so he brought him back to use for experiments. He has 3 laboratories the only some people have permission to enter the 1st one. Only senior Alchemist and he himself can enter the 2nd one. And only he is can to enter the 3rd lab. He is tasked to construct a reanimated Spirit but in the end he fails and dies trying. He first got paralyzed but because there was nobody allowed to enter the lab and everybody though he was still working on his Alchemy he died after 3 - 4 days.