"I have already come to that thought," Yamato replied. "But it just seems pointless. There is no real purpose to recreational activities, whether or not I am living on borrowed time. I do not gain satisfaction out of it."

Yamato was playing with a knife then, nimbly flicking it between his fingers as he frowned down at it. That was a lie. Yamato was doing plenty of 'recreational' activities, although they did serve a purpose. Educating Shijima to be more incompetent, teaching Shura new abilities so he could observe how humans turned demons function, working with Hazama in the labs...

They all had a tangible purpose and use. Making metal dragons? Yeah, no real...useful purpose...