Ybur escaped in fright from Ruby's side.
Ruby's plans have always been wildly imaginative, aggressive, and bold, filled with a "if it's not going to kill you, go ahead and try to kill yourself" attitude.
Sometimes Ybur wonders if Ruby might have a trace of goblin ancestry, those creatures who love explosions and end up blowing themselves up...
In any case, Ybur feels like he's grown up and should have some thoughts of his own, and can't just go along with Ruby's craziness, otherwise he'll eventually meet his doom.
—So his idea is to go find the Dragon Emperor, and listen to the opinions of a reliable adult.
"Good thing you didn't learn from Ruby."
The Dragon Emperor felt a headache right away: "Ruby... we might as well find a chance to lock her up again, her destructive power to the world is greater than the demons."
Ybur immediately got energized: "I second that!"
"I was just speaking my mind." The Dragon Emperor sighed, then pondered.
