Noa's eyes were filled with disbelief when she heard how her leader had caused such a storm when he was just out for a 'stroll' and couldn't help but feel small when she thought she couldn't even score fifty thieveries in months.
She finally understood just how powerful Ace's theft abilities were, and she couldn't even compare to him. She even got many insights on the path of a thief from Ace's experience.
Just for this specific reason, Ace told Noa about his method of thievery and his experience. He wanted her to understand that cutting hands wasn't the only way to steal, and it can be done in a far low-key manner.
Noa's eyes shimmered with adoration, and admiration as she looked at Ace. She didn't doubt his words even for a moment because of her complete trust in him.