Destroyer of Planets Book 1 in the Neon Octopus Overlord Series

Enter a galaxy full of snarky one-liners, inappropriate use of tentacles, and video game style battles.A life of captivity is finally getting to Kirian, Destroyer of Planets. She has never actually destroyed any planets, but getting to choose your own title is one of the few perks you get when working against your will for an evil Neon Octopus Overlord. In an attempt to gain her freedom back, Kirian defies the the Overlord and secretly saves the being she is supposed to kill, making life more complicated and dangerous for both of them. Then again, nobody ever accused Kirian of making good decisions.