Zhao Youyue may not be reading the script, but neither was she ad-libbing or going off track. That would surely derail the other voice actors. She was merely intimately familiar with the role. She had firsthand experience of everything else in the novel; those memories have all been branded on her mind!
As she spoke each line, she felt herself entering the literary world once again, speaking in place of Yu Shengfan. The mysterious, "intoxicated" feeling emerged once again, drawing out the best in her!
Of course, part of it was Zhao Youyue's own great efforts, but most of it had something to do with the mysterious power of the iconic character card. She performed the role to perfection, using a method that can never be emulated by anyone else, by being the character in the flesh!