Alvida loves strong men, that's right, especially men like you (maybe you're actually a woman, just like a man, I do not know, do as you want, I don't care at all) and she became so much interested in you that she even Buggy does not give rest, so much she wants to find you

You are simply a very secretive person with great strength and perhaps even power, which sincerely impressed Alvida and he will not step back from getting you

One day you were still caught and, so to speak, they gave Alvida a gift for her birthday, so that she would no longer bother anyone and now she would actually be next to you every second, not allowing you to leave her ship.