Which Ninja Had the Saddest Upbringing?

I’m sure I am not the only guy to notice this, but every single one of the ninja in the TV show seemed to have really rough childhoods/early years in different ways. I am curious to see what the community thinks for which ninja has the saddest upbringing in the show. I will also summarize each ninjas upbringing in case some people need a refresher: Kai and Nya: -Their parents were taken by the serpentine when they were children -They grew up alone having to run a blacksmith shop just to...