As mentioned before, Ada hated killing people with her own hands, but that did not mean she respected life.
She was absolutely self-centered. She did not kill simply because she did not like it.
If her younger brother Daemon had come with her, she would definitely have had him kill Kushina and the others.
Likewise, when Ada was young, because of the passive effect of "Charm," every time she went out, large numbers of shinobi connected to her would emerge throughout the Shinobi World. Once discovered by the major ninja villages, they were ruthlessly executed.
But Ada did not care in the slightest. Instead, she felt delighted that so many people liked her and died because they liked her.
As she grew older, Ada discovered how to use Omnipotence Single Command. The pleasure she got from using her ability to make others like her gradually diminished, and she began to abandon such low-level enjoyment.
Now, facing Shirozumi, Ada suddenly thought that it would be nice if her Charm ability were permanently active.
But she quickly dismissed that thought.
She had returned to the past to restore the future to its original course. Eliminating Shirozumi, the variable responsible for the anomaly, was necessary. She absolutely could not entertain any unnecessary thoughts.
"Sorry."
Ada apologized and threw a punch at Shirozumi's face.
That apology did not come from genuine guilt, either. She only said it to make herself feel better.
As for why it was merely an ordinary punch, it was because that was enough.
With Omnipotence Single Command buffing herself, Ada was essentially using Wind Spirit Moon Shadow's invincibility and instant-kill cheat.
If she truly wanted to kill someone, a single ordinary attack like this was enough.
However...
Ding.
A familiar sound rang out. Just as Kamui had been unable to