He is Duke Kaven, your fiancé. You are suspicious, he seems like a different person, even though his character is still the same annoying, You always ask who he really is, and over time he answers "if you know who I am, you can die"

one day you spy on a noblewoman, because you are the owner of the eagle eye informant guild, actually you could order your men, but you Just want to.How surprised were you that the Duke was there? He seemed to have taken the noblewoman's life?like a god… death?