Talk:Kain (Common)/@comment-108.15.7.3-20150426042139/@comment-25148607-20150427001634

You need to finish story quest in book 2. This is after finishing chapter ten which is the last chapter we can do currently. I have yet to finish chapter ten in both the JP and global versions but once you start book 2 (again, that's not implemented yet in global) the first story quest you finish (ideally, chapter 1-1) you will get 5* hero, then Kain, Michidia and Marina in chapters 1-2, 1-3, 1-4 respectively.

Also check this page, it's half finished however it may be useful...

http://chain-chronicle-global.wikia.com/wiki/User_blog:Starchythepotato/Future_Units_-_Evolutions