one time in one of my playthroughs i was at the collage in winterhold i just got j'zargo as a companion and i sent lydia back to my home (i think in whiterun).
i soon hear a commotion coming from outside of j'zargo's room, when i came out i saw lydia attacking mages and if i remember right she was out numbered, i was thinking somewhere's along the line of (wtf lydia what are you doing??, because i had here hauling some items i wanted to ether keep or sell later).
what was the worst thing your companion ever done?

I get really attached to Lyds. If she gets killed, I take her sword and shield and mount them on a weapon plaque to remember her by. I then drop a single red mountain flower by her and mourn. Then....the vengeance. No one kills Lyds and survives. Sometimes I have accidentally killed her myself in battle. When she's on her knee she is very vulnerable to a shout or overreached weapon swing or a shot in the dark. At such times I get very upset and usually have to restart the game...lose everything. I just can't live with the guilt. Please no one say 'it's only a game'. Like any really good story, it can get quite....emotional.
Oh yeah, except when they decide to randomly attack an important quest NPC, you know, just to mess with you.



