This remark was quite deft, though it was supposed to be a mutual meeting, it now appeared as if Kael had taken the initiative to come, a subtle tactic to slightly close the gap between the two.
Flandre actually quite liked how Kael interacted with others and reached out a gentle hand to pat his shoulder, saying,
"To rush to Lion Heart Castle in such haste after returning to the Royal Capital, I already feel quite sorry."
Kael shook his head and said, "Sister Franca, although we consider each other as siblings, we still interact too infrequently, often leaving us unaware of each other's sensitivities.
Instead of waiting for a rift to form and then attempting to mend it, it's better to show mutual respect from the start."
Under normal circumstances, Kael probably wouldn't have said something like this to Flandre.
But he had just sensitively realized that when Flandre spoke to him, she seemed intentionally wanting to get along.