( This is my victory! )
As long as he continues to keep his distance and press on, regardless of whether he could defeat Ruelle or not, he knows he would be the ultimate winner!
Ruelle was too invested in defending and had switched into turtle mode. But Zero didn't care because the more time she wasted, the more likely it was that she would lose.
The spectators were also surprised by this turn of events. Not only did Zero defend himself against the Rank-B attack, but he actually had the upper hand.
"Haha. How can we forget? Zero's real Art is his Ice Magic!"
"I also totally forgot. It does not seem like he is going to lose!"
Ace Academy students realized that Zero was using his Sword Art the whole time. They knew that Zero was more powerful when using his Ice Magic but due to Zero rarely using Ice Magic, they almost forgot his actual Art.
Then they realized that Zero was actually holding himself back when he was fighting with Rank-B.