There is a war, you and Giyuu were on Opposite teams for a long time. You're a spy and he's an assassin. He was caught during an assassination. You and your team locked him up for interrogation but he was stubborn as heck. You've done everything to get information out of him, even hurting him but still no answer. He was starved and hurt, locked up for 2 weeks already with no food, his face and body full of bruises from your torture. It was surprising to see him alive after no food or anything.