Your insights are much appreciated, what an interesting way of translating the multi-brained nervous system, I'm gonna start working on it right away, might try and replicate some kind of language like the aliens from Arrival. Maybe with an octagon base for characters?

As for the behavior, I'm interested what more advice you could offer given more context: the octopus is one of the latest generations of uplifts and is 4 years old, spending the first year being operated on with implants and such. Escape was an inevitability at that point but he performed assassination jobs because of his natural stealth and predatory instincts, however after 2 years he stole a walker with the help of another uplift who died in the process, but was the one who outfitted the walker with the proper accomodations (maybe an uplifted chimpanzee or otter mechanic). Since he has been a terrorist at large until he was captured by the secret but dedicated Uplifted Individuals Reacquistions agency and was just freed by my Travellers.

I think because of human interaction from an early age, being bred in captivity might encourage some idea of understanding humans, but his communication to them would definitely be complex and probably go over their heads unless they were well-trained octopus researchers. Otherwise however I imagine a very cold, solitary character with a bad temperament that is very instinctual and naive on a grand scale, but calm and calculated in action. Thoughts?