User blog comment:Mich, Michele & Kuhla/Future Units Preview/@comment-76.115.59.65-20151101224431/@comment-68.46.107.10-20151102013826

Karl dad is the 7th demon lord and ruler of fal nerga.In the game, karl is supposed to learn some sort of demonic trick which changes his apearence so my guess is that you will have to beat the Fal Nerga map then do karl's second grand quest(which will probably comes after conquering Fal Nerga) to get his 7star form evolution matieral(p.s Ive heard that 7star Lugina and Paris require an evolution item as well :[ ).