I used to think it was a mistake that Us supported the player even if the player attacked the mind flayer on the nautiloid.
I thought it would make more sense if Us turned against the player if the player started attacking the other intellect devourers, for example. After all, they would screech something about the player being corrupted if a conversation led to violence.
But now I'm beginning to think that Us is just as "corrupted" as the player characters. It was a newborn, just like the players. Maybe the process didn't fully take with it, either. Maybe when Us is querying an unseen advisor, Us is really talking to the sentience in the artifact... which is leading the player to the helm.
It's also interesting how Us comments if the player tells Shadowheart she has to be left behind. "Safe if she stays," is what Us says.
And Us mentions escaping a great evil.
It is worth noting that Us was originally planned to be a companion in this game, so this would actually make sense given that context.
