That some part of him really wasn't okay with Kratos fucking off and never will be. Abandoned puppy in the rainnnn. It'll just be solidified by getting the memory of Kratos leaving for good eventually! People can probably guess this is true but he will never say it, at least not without a dismissive qualifier of "but we had our own stuff to do so it's fine."

. . . if Mithos could make one change in his past, what would he change?