Honestly, I'm not really seeing the plagiarism, inspiration maybe, but really just a game studio tossing in all the things that are popular from anime and other anime game mechanics.
Yes the Gunslinger Female moves very similar to how Mesa does, but Mesa moves similarly to how every anime game with a gun class moves, it's like every action game designer watched 2002's Equilibrium and was immediately in love with "Gun Kata", see Lost Ark's Gunslinger, PSO2's Gunner, etc.
"Bullet jumping" and climbing on walls has been in every ninja game ever and is super popular with recent titles like Breadth of the Wild, Genshin, Tower of Fantasy, etc.
Calling this plagiarism is like when people would compare Destiny and Warframe back in the day because they were both FPS with space magic in the SOL system, but once anyone plays them you realize just how different things are and of course, since they're release a lot has changed for things to branch out in their own unique directions as well.