A common pitfall in long-running fantasy series is "power creep," where characters become so strong that battles lose tension. -Final- cleverly avoids this. While Rui does attain her ultimate form, it is not a simple "win button." The final power-up requires mastery over the very fabric of reality, demanding a mental and physical toll that threatens to erase Rui’s memories of her original world.
Here is the requested blog post.