The Difference in Our Eyes

(Taking place in year 2008) Erika Phantomhive is an almost 18 year old with a very ugly personality, and is to be married before next year. Her father, Ciel Phantomhive, is very strict on who she is to marry. Not until she has the courage to ask him if he would trust her to pick her husband. She didn't want a planned wedding to happen right off the bat; but one that means she and her fiance love each other. She had the butler, Sebastian Michealis, gather the names of "Princes" that are scheduled to be married. Erika then finds one that is familiar to her. Why is this guy? Why does she remember?