Isabella was more than a little peeved when Nero began to read Axel's note right in her class, right in front of her, without any regard for paying attention to what she was saying. If it weren't for Nero's perfect result in the previous surprise assessment, she would have shown him what it means to cross her. Unfortunately, he did get a perfect result, thus she reluctantly showed him mercy.
Considering his relative positive result in his fight with Axel, as well as Axel's response to his performance, Nero thought that note would not be too detailed. He was wrong. It was not a sheet of paper but an entire booklet!
Axel did not have an issue with his combat skill itself, nor did he have any issues with how Nero planned the fight out. Instead, in Axel's opinion, Nero's greatest shortcoming was in how he applied his Aetheric Halo.
