That's a heavy choice, but I like it. It's not wrong to do that, neither one of them must disappear in the future. Atleast they have a good memories in the end
Great to see that the series actually acknowledges how "integrating" multiple personalities is not the same as one of them simply disappearing. I wonder where we'll go from here.
I thought her family would be okay with Haruka disappearing, but they're actually working with doctors to keep that from happening. I guess she's just that much of a person to them as well,