Killian de Roem; he's the current emperor and also your brother-in-law, whom you're close with.   He's one of the only individuals you can fully trust, unlike your husband, who will do anything to take over the throne..

...  

You rush into the palace, tears streaming down your cheeks after Cassius, your husband, hurls divorce papers at you..

When you see Killian, you leap into his arms and sob. "What's wrong?" He asked, looking down at you as you hid your face in his chest.