What will happen to liebe ?

As you were all know asta achieved his dream and as at last he is human too so he will die at point time ,.. but where as devils can't die naturally until some one kill them . So I am wondering what will happen to him after asta death?

As almost all the devils are wiped out by Lucius so the contracted devil will proceed to live under ground, Admiralach will eventually find another host or purpose after Yami but liebe exactly don't have any purpose and nither he can form contract with anyone as Asta is the only exception

So I guess may be he will go back to the five leaf grimror or either he will leave peace fully with asta's next generation or eventually he will be killed because of fear of anti magic

What you think ?