Roy breathed a sigh of relief. He was glad that that cleared everything up. Still, that was a surprise -- but also not an unpleasant one as far as he was concerned. If Cornelia acted so quickly in his defense, it meant there was still some hope.

"After using the third Command Spell, the prana transfer is severed. She'd need to find a new Master to continue existing in this world when that happens. In past Holy Grail Wars, Servants have occasionally been known to kill their Masters after the third Command Spell was used so they could form a contract with another."