Blind Rage
Kuroha didn't have to think about killing anyone. It was almost natural to him.
If someone pissed him off, he would just kill them.
It didn't matter what his victim did, he would find a way to make sure they would die.
If they ran, he would chase. If they stood, terrified in fear, well that just gave him the perfect opprotunity to take advantage of the situation, making it such an easy kill.
Once he was angered, it was impossible to stop him, then again, it was impossible to stop him on any occasion. Though, with anger coursing through him, he was more dangerous.
Those stupid pleas and begs of mercy meant nothing to him.
Nothing would be able to stop him from killing his victim.