Source of information:
http://www.falcom.co.jp/cd/lyrics/aokinegai.html
"Azure Wish" which is the main theme to The Legend of Heroes: Ao No Kiseki Evolution will be released as a digital single on July 9th 2014
No idea who the singer is but the composer and performer is the Falcom jdk Band but if anyone knows anything more about this then please do let me know