Divinity: Original Sin 2 - Sir Lora

Only adds a single NPC that follows you around and is difficult to keep alive (There are ways around them dieing if it does happen but its tedious) This character does almost nothing, The plotline mentioned by them never comes up during gameplay, is never resolved at the end of the game, and all you ever get from them is a few random skill books that are useless by the time you get them. A big let down.