Nero's victory was already premeditated and even if the withdrawal tends to be anticlimactic, the public that saw a good fight screamed and applauded.
The fact that Robert was able to cause so much trouble for Nero, even forcing her to use three magical beasts was enough to demonstrate his power. Hence, the audience was quite inclined to call out to him and congratulate him, even though he actually lost.
Nero, who was most honored by the applause and praise, continued in the arena and waved to the audience a few times.
It was necessary to say that Yui and Choko were the viewers most motivated to root for her.
"Do you wish to continue?" It was a silly question since if Nero wants to win the tournament, she would have to keep going, however, she still had to ask since that's how things work.
Nero nodded, as expected: "Yes, I will continue."