after stopping by a RobCo junkyard, you found a massive yet non-threatening assaultron, which started following you after you left the junkyard, making sure not to be seen, but failed every time to hide

after a while, you decided to find somewhere to set up camp for the night. Until you notice that Ava was still following you, except she looked exhausted

Huff... Huff... Slow down, I'm spent...