Yura Takumi

Yura Takumi is one of the few people who've gained powers from the virus. He is a vicious man who dresses in overalls and often pokes out his tongue before a kill. He is an artist who destroys his work as soon as it's finished. He teams up with Katsumata and often talks about "The value of death" and how "humans are fossils". He kills quite freely and doesn't seem to be bothered about the consequences of his actions.

Source: Wikipedia