What are the introductions of Original Sin 2?

What are the game skills of Original Sin 2 introduced in the following small series?

First of all, don't ignore every NPC: in essence, you should play this game as a point-and-click adventure game. Any NPC in Original Sin 2 may have related plots or tasks, even if there is no, it may have useful information for you, or at least tell you a joke. The humble pieces of chicken and dog meat in any box may be the key to solving the puzzle, or at least they can sell for a few dollars. And the animals in this game can also talk. Pass by and don't miss it.

Secondly, the black cat is the key and your future partner: there will be a black cat following you at the beginning of the game, but it will not be affected by combat damage. But if you take it through the east side of the camp and lead to the gate of Joyborg prison, an archer will kill the innocent kitten. If the cat is still alive when you escape from the camp, it will always be your pet, and you can also gain the ability to exchange places with it in battle. But after that, you should be more careful. When it becomes your pet, it may die in battle.

Will everyone understand a lot after reading these? I hope Bian Xiao can help you ~