2 years had went by after the death of both the Erza Pendragon as well as the Mordred Pendragon.
The king grieved, cried and despaired.
Many woman tried replacing his wife, but he denied them all. Even when Merlin tried to force Arthur to get himself an "new lover" or Morgan tried seducing him, but all failed as he denied all of their request and attempts.
He had only love for his beloved Erza and did not wanted to replace her.
…
However, even though he still couldn't get over their death, he still kept his duty as an king and as an hero as he continue slaying and slaying and slaying and slaying, monsters over and over and over and over.
Saving the day again and again and again and again.
Honestly…. He was like machine.