Copying Made Me the Strongest [Crossover]

I'm no good at anything, but I'm number one at copying. As long as you dare to use it, I dare to copy it. Reader's guide: - The heroine's ability is copy: she can copy other people's skills. - Lots of personal headcanons, bugs everywhere, a chaotic timeline, and even more out-of-character moments. - The story takes place not long after Yuji faked his death and the White Whale sank. - The male lead depends on fate. - And finally, mwah~ Theme: A stream doesn't compete to be first; it competes to flow on and on.