Kingdom Hearts Unchained X Mystery Medal Teased

As we get closer to E3, Square Enix are starting to hype up the upcoming Kingdom Hearts HD II.8 Final Chapter Prologue game, this image was released by the Japanese Kingdom Hearts Unchained X account, stating if they got over 10,000 retweets by June 7th, every player of the game would get the surprise mystery medal. This medal, which looks a lot like Aqua, who is the lead playable character in the upcoming Kingdom Hearts 0.2 Birth by Sleep–A Fragmentary Passage. The tweet has already been retweeted over 10,000, so it should be revealed soon by Square Enix.

キングダム ハーツ Uχhttps://t.co/mAvmiWCPd4
★謎の新メダル RTキャンペーン★@KHUX_PRフォロー＆このツイートをRT！
1万RT達成で謎の新メダル全員配布！ 6/7まで！#KHUX pic.twitter.com/B8iogYx5Ea

— キングダム ハーツ Uχ公式 (@KHUX_PR) June 6, 2016

Who do you think this mystery medal is?