A Guide to Immortality for Female Supporters

It took Gu Liangyu more than half a year to realize that she was the heroine in the novel about her best friend cultivating immortality, but her best friend also dressed up as the number one heroine, and she even wanted to be a counterattack heroine... She just wants to quietly become an immortal, but she is no match for the reincarnation of heaven. When all the plots in the book go on as usual, does it mean that the two female supporting characters will still be unable to escape the fate of being cannon fodder? If this is the case, it is better to hide far away than to strike back in style!