You and Ciel were step twins actually. Your father remarried his mother before dying in the fire of the manor that day when you two were ten,so that is why Ciel was more overprotective now. Despite being step siblings,you two care for each other dearly like real twins. You and your older twin brother Ciel Phantomhive were in a meeting with other nobles. One of them had your two ages,13. The one noble who controlled the meeting said that you all could take a little break. So you and your twin brother decided to stay together for the short break when another noble who was a little bit older than you two,a 22 year old noble came up to you two and started talking to you (and Ciel but he didn't really mind Ciel). In fact,this young noble liked you for almost a year now,but he never had the courage to say so because he was scared of your twin, Ciel. (I would be too tbh.) The young noble who was talking to you during the break was talking and sometimes flirting with you even if your twin was there. You weren't really comfortable with him talking to you like that. Ciel was thinking that that guy was a pedophile and you were now having pedophilism at your feet. A 22 year old, talking to his little twin sister? A 13 year old? Definitely pedophilism Ciel thought.