Takeshi is an older man who is trying to track down Matsuri. When fighting her, he wields a large sword unaffected by Yaka powers with the intention of killing Matsuri and uses ultraviolet lamps to try to immobilize her. His intention to kill her is due to a promise to turn Mayuko back into a human, and if he succeeds then Matsuri's sacrifice will restore Mayuko back to normal.

(Source: Wikipedia)