Yes, Vishi is definitely just like a Youmo.
She is a demigod who has lived for three thousand years, three thousand years, enough for the sea to turn into fields, civilization to weather into rubble, and the current calendar is only at the year 1669; the years she has walked through are twice the epoch.
Time is the strongest force, so the mages who can resist time, their wills are more unbreakable than reinforced concrete pillars. Even if they are from different timelines, their personalities cannot drastically change, at most they experience different things, but their essence remains the same.
But even if Vishi can unlock all her traits, it happens that her traits are the type Ash least wants to see!
Although it sounds bad, if he had to pick one out of four operators to die, Ash would undoubtedly choose Vishi. Moreover, even without this choice, he would definitely have to take Vishi with him to die in the future.
