-We all know by now that Kai was basically the only person Nya had and vice versa, and that they promised to take care of each other. I do think that other villagers in Ignacia would help them out occasionally by buying stuff from their shop (I mean, why would a small, peaceful at the time village need to buy so many weapons from one small shop?).

And yeah, in S7 it's mentioned that they had a babysitter, but even a babysitter wouldn't be able to be there 24/7 for them.

Also come on Kai, you grew up with a sister, get better at flirting with other girls already.

But I do believe he's A+ when it comes to girl problems.

-From the flashbacks in S8-9, I think that Jay was the first one Wu recruited and that it took a few months before he could find Zane and eventually Cole.

And, well, imagine Jay, the most talkative person in the world, having no one else to talk to but a sweet yet strict old man who exhausted him with training every day. Not that he had many friends back at home to begin with.

He would constantly ask Wu whether he would ever find someone, a friend or even something more. Wu would always respond with "your time will come".

-Pixal and Skylor always wondered what their purpose was. The only people they could talk to were either brainwashed maids or cold-hearted Nindroids. They wanted to know what's out there.

-Lloyd wondered if he would ever find a real family. His experience is similar to Kai and Nya's, but at least they had each other. Because of their similar stories, these three are inseparable. He was considered the third Smith sibling for some time, and still is when he needs it.

-Cole always wanted to do his own thing, we all knew that. But with a single loving father and no known mother, he didn't have many choices. Since he was all his father had left, he felt the need to continue his legacy, even if that meant he wouldn't be satisfied himself.

-Zane would constantly ask Dr. Julien about the outside world. What people were like, how they behaved, etc. He would ask Wu the exact same things when he first got to the Monastery.

Jay would usually answer him (though he couldn't help much on the 'girls' topic), but both Wu and Julien would always give him the same answer: "It's best to discover that on your own."