In term of body size, Cinderella was bigger than Ars. But at the time, while Ars standing in front of Cinderella, somehow, Ars looked much bigger, feel like an enormous red winged lizard in front of Cinderella's eyes.
"You should still be sleeping."
Cinderella realized the threat posed by the enemy in front of him, but he still refused to back down, not with empty hands.
"You should not disturb my sleep."
Soul Saint told that Ars truly represent his Sin and the Support Creature's figure, Greed of Fafnir. A dragon greedy for wealth and power.
"Now, how should I deal with you?"
Ars snapping his right hand fingers. He who only has one hand shows dominance to Cinderella who has just lost two hands.
It felt like he cut both Cinderella's hand in purpose. So Cinderella will not make fun of him. Although the most striking changes were his mustache and beard.