Ketis suddenly realized that there was more to her living sword intent than she initially realized.
The 'pet' that Ves created in her mind was not just a personification of her sword intent. She already knew that its nature was beyond her understanding, but she always figured its purpose was relatively simple.
Aside from keeping her company, Sharpie also assisted her in performing her superpower and deepening her insights into sharpness.
Its presence constantly inundated her mind with sharpness, allowing her to develop a more profound feel for the concept.
In turn, as her comprehension of sharpness continued to rise, Sharpie grew even sharper.
In essence, Ketis formed a mild positive feedback loop with Sharpie. Their symbiotic relationship meant they constantly stimulated each other.