Muramasa Katase
Months Later
Things had become strange for Katase in the months that followed. She remained in one place, a single city, and made residence for herself. She could not leave, and her agreement with her current wielder was something she felt uncomfortable violating. 'Minato,' as Mitsuba insisted the new identity made from one of the demon weapon's many souls should be called, had yet to do anything to betray her end of it and was not a deceptive human in any case.
Mating with Minato was not so much of a tribulation a full week after her beloved Kenzo's death, as opposed to the evening of. The demon sword kept up her end of the arrangement for now, and watched with a sort of distant curiosity as her current wielder exhibited all sorts of bizarre symptoms. Katase had never actually taken the time to examine a human woman through the full course of pregnancy, so this was all quite strange for her to see. Did all women go through such things when creating more humans to pollute the world with? Were their offspring even human? It seemed very unlikely in light of what the Muramasa and the... whatever Minato was, really were. She was starting to feel a little eager to find out.
In the meantime she spent that time reading to catch up on what the humans had learned of their 'material sciences' and such. She had a feeling she might soon be able to replicate their so-called firearms, or recreate her own blade from materials that would not be so easily magnetized. Still, the learning was a slow process - experimentation was still necessary. Focusing on something for long stretches of time was also new for her. There was also the time Katase had to spend getting accustomed to being a 'Mifune', her new primary puppet's surname. This meant she had to spend time working at Minato's new business when they were not killing things.
Or, as it were, walking along with her and pretending to be human with her. It was not an objectionable use of time. The day was pleasant enough, and Minato had thoughtfully remanded custody of her true form to her current puppet so she could experience it properly. It was a good time to practice her... facade.
"How much longer will this last for, Minato-chan? You move so sluggishly this way," she said with a smirk, and a pointed look to the belly of her 'cousin,' right before catching sight of yet another pregnant woman. Her voice lowered, and a hand went to cover her mouth. "Oh my~. It seems you were not the only one to spend time in another's arms beneath the sheets on a cold winter night."