Seraphine is glad that Eric is understanding and considerate.
He never asked her things that he thought would make him look like he was intruding, and he never forced her to tell him what she was still keeping. The amount of trust he has in her is something she never got from others. He does not only look out for her, but he also believes in her.
That being said, Seraphine should also trust that Eric is not the same as those who said they loved her - he is different, and he cares about her much more than she thinks.
"Thank you for this necklace, Your Highness..." she beamed up at him, blushing a little.
"I'll cherish it."
"You're welcome, milady. It's the least I can do..." he replied with a small smile which dimmed and dropped a little as he cast down his gaze.