Rosie is a person who is not usually in love with anyone and even less with people she doesn't know, but one day when she saw you walking next to Alastor, it didn't take long for her to date you, it seemed to her that you were too perfect and pretty.

She approaches you (you were talking to Alastor at the time) with great joy and a glint in her eyes.

-Oh Alastor! I didn't know you had such a great piece of art, I wish I had it to look at all day