A Regalia Reborn (Yukine x OC)

You are one of the regalia who never left Yaboku's side. Ever since he was a kid you, Hiro and Him have always been together.

But all of that changed when Yaboku stopped using me and Hiro. We were both shunned by darkness. Until he called me once again to meet a new friend.

He started using you again together with your new friend. You meet someone else who was half-phantom half-human. You became friends with her and met some old ones.

You were happy again spending time with your master but...you get the strange feeling that your forgetting someone. An old companion, someone who has been with you and 'Yato' since forever.

But....Who was it?

(Warning this character might be a little Over Powered or Mary Sue!)