I wonder if the MC’s child will ever get competitive or antagonistic towards the MC’s adopted child, granted the former is still an infant but there might or might not be a time-skip after the conclusion of the Demon War.
Also I think I found some in-game evidence to suggest that TLH is in fact a sequel to Life of a Wizard when Archmage Cumari said that ‘‘About 50 years ago, a coven of Necromancers were found working in the Academy.’’
There was a secret society of Necromancers at the Academy in Life of a Wizard, Cumari’s statement suggests they were caught half a century before the events of LH2 - therefore it seems unlikely that they reestablished themselves in the same institution where they were exposed, which means…
King Norbert from LoaW might be the MC’s ancestor - maybe their great grandfather and if Princess Emily was romanced and Prince Travis became King, then from that perspective the Lost Heir MC is a determinant decedent of the LoaW MC, or could be completely unrelated at all.