Yep, Dr. Grace is the main reason this underwater City exists.
Like I mentioned under this comic, TENka City was built with a lot of opposition and controversy due to the horrific failure of the previous one. Dr Grace, in order to appease all the extra protocols, mandates, and regulations, and get the needed funding, decided to get TENka, one of the most prestigious tech companies of the time, to not only work on his City and give it state-of-the art tech, but to agree to live there to prove it was perfectly safe. The move was supposed to be temporary (the contract was for 3 years or until the City was filled to capacity) but then the Ending happened and yeah, they're now stuck there.