Despite their resemblance to humans, ghouls were known to be foolish and relied solely on their instincts. Therefore, what this ghoul did was an anomaly. It had an IQ surpassing that of other ghouls, and its intelligence and ability to manipulate blood essentially demonstrated its potential.
That was why Ren needed to kill this monster.
Quickly, Ren ran towards the jacketed ghoul. He raised his wakizashi and swung it down forcefully. The ghoul created a blood sword to counter the wakizashi, but Ren added so much strength that the wakizashi easily cut through the blood sword.
Ren swung his sword again, this time horizontally. The jacketed ghoul raised its left hand, and Ren's short sword injured the ghoul's left hand, causing it to bleed. The blood then spread and hardened, protecting the ghoul's entire left arm.