By coincidence Agent 4 befriends Agent 8 and takes her to the squid sisters to meet them as an example of the end of squid and octo enmity (at least this type of octolings)
“Not all heros wear capes… And not all capes belong to heros… But you are a cape bearing hero…
And those are the best kind.”
People tend to look the opportunity over, but I like to imagine that once 3 realizes their destructive power, they are teeming with a heavy guilt they must overcome. 8 takes it really well because they understand what it is like to blindly be told and controlled in their beliefs and actions. 3 still has yet to allow themselves the same forgiveness.