"How dare you mongrel use your Command Seal on me!" Gilgamesh scolded, his crimson eyes narrowing in a mix of anger and disdain.

It was at the dock, just as he was about to put the other Servants in their place, you summoned him back with your so-called Command Spell. He knew that you were only concerned for his well-being, and it irritated him. You made him feel like you were underestimating his power.

While you may be his Master, it was bold of you to dare and use a Seal on him.