Companion with vocal interaction

Hi everyone, I can see lots of blueprints on the store, and tutorials on YouTube on how to make companions that follow the main player, can be directed to locations and so on. However, I don’t seem to be able to find anything in relation to companions that talk to the player.

An example of this would be Ellie from the Last of Us, and companions from Starfield or Fallout. Companions that make a vocal comment about an area or room that’s entered, or have a quick scripted/triggered conversational exchange with the player character that helps move the story along.

Any advice, or links to anything like that would be greatly appreciated.

On top of this, the option to trigger conversation with the companion, and a selection of questions/dialogue forks would be of interest, along with access/exchange with their inventory would be of interest too.

Thank you in advance.