Siblings Across Honkai Impact 3rd

The female lead is Bronya, and the male lead is Xiao Yu. The protagonist also has a younger sister, Xiao Ling. The story will start with some scenes of the brother and sister on Blue Star. The protagonist will wield an energy similar to Honkai Energy, called “Blue Star Energy.” He's nearly invincible, and the story will feature everyday life and mecha piloting. There may be some angst early on, but it will definitely turn sweet later (ᗜ ˰ ᗜ)