“By my Command Seal, I order you:”
“...Foolish.”
The Heroic Spirit shook his head, judging that the man intended to impose his dominance by means of a Command Seal.
Restraints effected by means of a Command Seal were merely momentary. He knew that he could easily shake them off with his own magical energy. Even if he was ordered to kill himself with all three Command Seals, he judged that three suicides more or less would not pose a problem. He decided, however, that if the attempt would teach the mage the futility of binding him with Command Seals, and help him to understand his place, he would not prevent the mage from wasting one Seal.

Fate/Strange Fake: Volume 3, Interlude ("The End of Escape")