The Elf siblings disapproved of Yuri's plan, but they couldn't do anything to stop him because Lord Kieran had already given Yuri the go-signal, as if the demon lord had already anticipated this outcome.
Lady Selene hated that Lord Kieran was willing to accept his end. She felt that he should have taken a precaution before facing the mad Red King rather than accepting his fate to die like this. He should have taken Iris's feelings into consideration.
Meanwhile, the Red King and Darvyn couldn't hold a candle against Killian Fleurnoir. Perhaps it was because they had already fought against Lord Kieran and Aiden that they couldn't keep up with the demon from the Dark Abyss.
They also found themselves at the disadvantage as neither of their magic could affect Killian even a bit, and they could only rely on physical attacks instead, which was proven futile as none of them could land a hit on Killian.