Princess Amelia held the "Star Tethering Plate" in her right hand, which was the main purpose of her trip. Owen Bertram guessed that the reason she was determined to obtain this treasure was probably related to her growing experience. She didn't trust anyone and lacked a sense of security, so she hoped to have a treasure that could warn her of future dangers.
As for whether this treasure had any other functions, Owen Bertram didn't bother to ask, lest Little Princess misunderstand him coveting her treasure and get angry and peck at people.
Little Princess quickly examined the other four treasures she had grabbed, one in her left hand and three in the phoenix tail. Her eyes shifted, and she suddenly smirked, reaching out her left hand and three phoenix tails to Owen Bertram but not opening them: "Brother, as a witness, you can pick two of these four treasures."