The Purchase of 'Decent' Goods!

At this moment, everyone was astonished by the turn of events. Most of the people in that area, especially Duke Albert, knew the lore of the sword. And they knew that upon successful removal of the sword from the stone, a contract would be established with the sword—similar to other Legendary Sword known to exist in the past. Where giving the weapon's 'spirit' a name was a way of forming a contract.

Other than that, Everyone, including Clara, knew that only the person who drew the sword successfully was the only one worthy of the sword. That is why all of them were surprised when Pedro even 'redirected' the ownership of the sword to her. The only remaining possible reason for that to happen is that Clara was also worthy of the sword herself.