Saitou was almost about to scowl out of habit when sensing the presence of someone else, but he knew who was there. And he couldn't help but smile a little when he was approached. Company was all right. He could still think while someone was nearby (unless it was that stupid ahou back home who couldn't shut up) and, like Hiruma, found bouncing off ideas with Kiryu was actually beneficial at times. He's silent for the moment as well, pausing a few seconds before leaning forward and lighting a new cigarette.
ahahahaha
"Like minds, hm?"