Kai knew that they were supposed to wait and let Zane figure out when he was ready to talk about everything that happened with Azizi. Waiting was not, emphasis on not, his strong point, but they were supposed to wait. And so Kai would wait as best he could.
That was hard, though, and it got harder and harder as time went on and Kai saw the effects of Azizi in every part of Zane's life.
Azizi tormented his sleeping, as Zane had intense nightmares that woke him at odd hours and kept his nights from being restless even when he was able to sleep. Azizi impacted his eating, as Zane ate more now in trying to make up for the lack of food that had been forced on him while being experimented on. Azizi changed him helping in fixing up the to-be academy, because the tools they used often reminded him of tools the scientists had used on him.
Azizi even affected him when they were just hanging out. That was probably worst of all, at least in Kai's point of view. After all, hanging out together as a group was supposed to be a time for having fun, for relaxing, for not having to worry about anything. Azizi's effects had taken that away from Zane, because none of them could anticipate what would impact him, and when and how it would happen. Almost anything could and often did set Zane off. A video game about bringing the law to a lawless city had gun shot sounds that made him tense up. A board game focused on current events had covered the topic of animal experimentation and provoked him into a full-body flinch. Even a dramatic and tragic romance movie, which Zane normally would've found anywhere from bemusing to amusing, had included a part about blood draws which caused Zane to stand up and leave the room. Remote controls scared him, scientists wearing lab coats in video games frightened him, handcuffs and chains on cop shows alarmed him, and discussions of pretty much anything to do with mechanics, statistics, or the way something worked terrified him. Zane was afraid of things that Kai never would have thought of in a million years, and those things found their way into everything Zane did with everyone and made it all stressful for him, including the times that were supposed to be the least stressful.
So yeah, with even downtime going downhill for Zane, Kai found it hard to wait. Zane was finally home but was still suffering, and they couldn't really do anything about it until Zane was ready to deal with it. However, with Zane's ability to make decisions for himself so important given the fact it was taken from him for weeks, Kai was able to hold his tongue and bide his time, only talking about how worried he was about Zane when Zane himself was nowhere in earshot. Wu, Nya, Lloyd, Jay, and Cole all did the same, and together, typically in pairs and trios stealing time by themselves, they worried as a group and waited for Zane to come to them.