Hakurei Reimu's ability was the "ability to fly through the air," but in Gensokyo, was there anyone with even a little fame and a name who, like Groudon, could not fly?
Her ability seemed useless, but with cheats on her side, she was absurdly strong. And the "air" in "flying through the air" did not refer to the sky, but "emptiness" in its broader sense. Thus, she could freely pass through space and barriers. Her famous ultimate move, "Dream of All Life," pushed her ability to its limit and entered a state of "emptiness." Put simply, she activated invincibility—no attack could touch Reimu, while all her attributes rose, allowing her to rush in and deal damage, with an execution effect on top of it all.
That was why Hakurei Reimu was considered the strongest in Gensokyo. Of course, that was only in theory. If she encountered someone powerful enough to blast apart even Gensokyo's barrier and destroy her cheats outright, she would still have to lie down.
Seeing her best friend Hakurei Reimu take to the sky, Marisa mounted her broom and chased after her. As she pursued Reimu, she unleashed all sorts of mushroom-made ammunition, firing off a cannon blast whenever she found an opening.
That left Yakumo Yukari, still maintaining her motionless pose, facing the wary Alice and Patchouli. As for Mo Yi, he held Shinki tightly, preventing her from jumping in and instantly killing Yakumo Yukari because of Alice.
Of course, calling it an instant kill was an exaggeration. Yakumo Yukari was Gensokyo's trickster enchantress, after all. She possessed a cooldown-free mobility and hiding skill—Gaps—and her ability to "manipulate boundaries" could reverse all things, even concepts. Her skill set was flashy beyond belief.
It was just that her own raw strength was limited. Against an overwhelming gap