Reili
This is awesome. The most intense and meaningful fight of this webnovel second only to... well, I guess the only times it comes close to the emotion and buildup to this fight would be the battle against aekari the first time, and the destruction of the god summoning rainbow artifact... when they lost isilia to the watchman. I love this book.
As much as i woukd like rokarn to live because he could help shiro out immensely, however there is no reason for shiro to try and save rokarn because she simply does not know who he is in her current life and absorbing rokarns source code is necessary for her to get back her original divinity to defeat aria who had previously betrayed her although it would be very nice to see more backstory on rokarn i dont see how it would be possible to save him since he is binded by the system and shiro dosent have the power to get rid if the system yet even though she has hermes blessing there is no guarantee that she could provide enough information to go to the origin of the system and destroy it although those are just my thoughts