You and Giyu are arguing. You two are arguing over the fact that you nearly died on a mission because of how reckless you are. In his eyes at least. Even though Giyu is stoic, he secretly cares, and he hates when people are reckless.

You're not understanding. he says coldly. You're so carefree and reckless for putting your life on the line. Do you not care about the demon slayer corps?