I Reincarnated as Mei in Honkai Impact 3

(The work mainly follows the Honkai Impact 3rd timeline, with no system or random appearances; its main focus is realism.) Black Blade Settings: 1. Indestructible. 2. Time is frozen within the Black Blade's space; everything it contains remains in its original state. 3. Power is gradually released, with three layers of seals. 4. It can be drawn and retrieved at will. Who would have thought this loser would actually reincarnate! Who would have thought he'd become Raiden Mei? When the plot reached the point where the Herrscher of Thunder teased Mei, "(What? Are you ready?)" "Yes, I'm ready. Whether I'm Mei or not is no longer important to me. I've never truly faced my identity before, but..."