A lighter multi-body offshore wind turbine platform concept, called TetraSpar, is recently designed to drop the levelized cost of energy and facilitate the transportation and installation process. As opposed to the common unibody design, the TetraSpar platform vibrates in collective, local, and coupled modes. In addition, implementing a detuned blade pitch control system has gained recognition as a viable approach to address the issue of negative damping in floating offshore wind turbines (FOWTs). Therefore, this research conducts a thorough analyses to fully understand the platform when coupled with a large wind turbine and investigates the contribution of different control methods in stabilizing the system. We use FAST-to-AQWA (F2A) coupling framework to model the multi-body structures, flexible components, and aero-elastic responses