While being armed was not uncommon for the detective these days, it was incredibly unlikely for him to actually pull the gun out at any time. Just as his parents, Hakuba was a pacifist to a fault, but everyone, he supposed, had their limits. 

His happened to be assassins with which he had a personal grudge against. 

Even then, the weapon was meant to be more of an intimidating tactic than anything. Hakuba wanted Spider to know that he was serious, and that he was more than capable of transcending the apparent typical high school detective convention where necessary. And, now that it was after a heist, and he’d tracked Spider to a place he imagined the assassin thought was safe, it was time to show that he meant business, coming up behind him to press the barrel of the gun against Spider’s back.

“I can be cruel if I have to,” he whispered, smirk tugging at his lips. 

He would be Spider’s Sherlock yet.