The Heart Of A King (Custom Modern AU)

Raven is sister to Ghirahim, and unfortunately on the run with her brother. Tired of being used, Ghirahim decides that he's had enough of it, and refuses, causing Demise to become rageful. He is now after them, and has promised to kill them is he manages to catch them. Fearing for his sister's life, Ghirahim takes them to the only person he knows that might be able to help. But Demise is hot on their trail, and soon Raven decides that she needs to do something, against her brother's wishes. She leaves to go and discover the key to stop Demise, only causing more that just her brother's heart, to realize just how much they care for her.
(I know the summary sucks. Also I have never in my life played a LOZ game, so don't get on to me. This is my AU, which means people are going to be OOC, so get over it.)