Dereck_Oliveira
I know that this is a fanfic, an AU of the original world. However, I want to comment that Grimmjow never reached the state of being a Vasto Lorde. In addition, Stark create a Lilynette when he becomes an Arrancar, not generating a Zanpakuto, but a new life, that's Lilynette. So, Stark was alone until he becomes a self-made Arrancar.
The more I read the more I'm getting bothered by the fact that anything related to "evolution" is some kind of tribulation, firstly when he lost his memories and skills, and both the first and this time with the torturing pain. Idk what that was supposed to inspire, but evolution should be anything but painful and/or memory loss inducing since his brain could have only gotten bigger and better so he should have had absolute clarity rather than being used as a cheap plot device to lay a layer of mystery on the background of the MC.