"I killed your parents in person."
When Grandpa said he was going to reveal his secret, Karen had prepared himself for it. Even now while still lying in bed, he was ready for whatever was to come.
But he honestly didn't expect that Grandpa would truly not even give any preamble, instead launching straight into the heavy truth.
Perhaps, as Karen had suggested earlier, it was about seizing the moment and saying those things that should be said.
"Your parents, like me, were also Judges of the Order God Sect."
Karen noticed that Dis used the word "Judge" not "Priest".
According to Poll, the titles within the Orthodox Church might vary, but they generally followed a specific sequence:
"Purifier-God's Servant;
Inquirer-God's Revelation;
Contemplator-God's Priest.
The fourth layer is the Judge.
It is higher than the first three.
Hence, "Karen's" parents held quite high-ranking positions.