Seraphine agreed to play along with Eric.
She was on the same page with him when he said that he was only liked because of his appearance - it was kind of true, after all. Now that he'd been tidied up and groomed for a little bit, he started receiving all this attention. And though that's only an expected reaction from a crowd, that didn't mean he should be treated as someone lower when he was still not looking like this.
That said, Alice doesn't deserve Eric - he's better off with someone who'll truly love him.
Until he found that someone, Seraphine vows to help him in any way she can. He's the first friend she made without the help of her power as a succubus, after all. She will definitely cherish him.
"So, then, what'll we do now, Eric?" she asked as she accepted his presents, unable to keep herself from smiling.
"Well, I think this is enough..." he answered while he took a glance at the crowd that had gathered around them.