1. Link from Breath of the Wild would be appable, as he has a demonstrated personality and backstory in the game.

2. While he would be allowed to keep the Slate as his in-game device, it would be emptied of anything it's carrying and that inventory would be available to regain at a later time through missions etc.

3. The chips would suppress the ability to use the Slate as a powered item, yes. We can say it interferes with his ability to interact with it in that way.