I think Hook will be too focused on getting his hands on the dagger to pester poor Belle. However, I do agree that he will at the very least attempt to bring her over to his side. But he’ll probably leave her alone after his first failed attempt.
And in regards to the dagger, I have a feeling Cora told Hook about the dagger. Cora was one of Rumpel’s pupils, so I wouldn’t be surprised if she somehow gained knowledge of its existence.
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