He might be annoyed. After all, being stuck doing something you don't want to do is not pleasant.
Maybe he'll be really bored at first. Fanfictions can be quite strange sometimes, especially if it's not something he's interested in. He might try to find a way to stop watching, like looking for an exit button or asking someone for help.
He might be really bored or annoyed at first. Maybe he'll roll his eyes a lot and keep thinking about how he got into this situation.
Maybe someone forced him to. For example, a friend who is a big Syrus fan might have put it on and made Zane stay and watch.
Well, in the Yugioh fanfiction scenario, Zane getting stuck babysitting could lead to some really interesting character development. He might learn more about patience as he tries to handle the energetic Yugioh - loving kids. He could also discover new things about the Yugioh world from the kids' fresh perspectives. For example, they might introduce him to some unique card combinations that he hadn't considered before. And who knows, maybe through this babysitting experience, he'll form a special bond with one or more of the kids that will have an impact on future events in the fanfiction.
Jay would probably be very vocal. He'd be shouting for help and freaking out a bit. Kai would be angry at whoever or whatever hurt Zane and be ready to fight back immediately. Lloyd, being the leader, would try to stay calm on the outside but be very worried inside and start coming up with a plan to help Zane.
He might be initially in shock. Percy has been through a lot with Annabeth, so being dumped would come as a huge blow. He could be speechless for a while, unable to process what has just happened.
He might be shocked at first. Naruto is used to seeing Kurenai as an ally, so being hurt by her would be unexpected. He could immediately ask her why she did it. If it was a serious injury, he might struggle to stay conscious while trying to understand the situation.
Well, Sirius could get really flustered. It could lead to some comical or tense moments depending on the context of the fanfiction. The howler might reveal something he doesn't want others to know.
Maybe Zane and Syrus get trapped in a strange virtual world created by some glitch in the digital system. They have to rely on each other's skills to find a way out. Zane's logical thinking and Syrus's knowledge of the digital realm might be combined to overcome the various obstacles like malfunctioning programs and security barriers.
The main characters are clearly Zane and Syrus.