Evolving a Hero Unit when you already have non-hero evolved version
I got an epic+ Violet from the current pact using my free sigils. Got 3 in a row form the 15 pact >.> i was pumped for another quickstrike commander so i hero'd her with the souls i had. Saved some more sigils through the course of the pvp event (still kind of a newish player so many achievements giving me blood sigils) and did another of the special pact and this time i got violet's 5 star and the last 4 star violet i needed to evolve her, so my quiestion is:
If i evolve the 4 star violet who also has been turned int oa hero (all fuse slots with souls) into the new 5 star violet (who i fused a 2 star soul to hp just for the sake of it >.>) will the 5 star violet become hero'd or will i lose all the souls i fused into 4 star violet?