There is an unwritten rule among the dragons, in fact, that exists in many other races, but dragons as such proud creatures respect that even more. It's about not interfering in a duel.
Yet, when Lord Han sees his son begging at his feet while Aylin threatens his life, he stops thinking about pride.
"This wasn't supposed to be a fight to the death!" He speaks in an authoritative tone to Aylin.
Aylin's eyes glow golden as she points her naginata at Lord Han and his son. "You come to my home to offend me and force me to serve your selfish purposes, so I have the right to defend my honor, even with your blood!"
"This is madness!!" He complains as Han Feng struggles to get up, but even the treasures in his body cannot fight Aylin's overwhelming golden energy.
"No…" Garen also gets into a combat stance as he looks at Lord Han. "This is a duel, and you must not interfere."