Similar to Fused Zamasu, Hearts is a self-righteous and arrogant individual, with a self-serving and all-consuming goal. He believes that the multiverse can only truly be free once the gods, including the Omni-Kings, are killed. This love for mortals and hatred of gods extended to his accomplice Fused Zamasu, who Hearts promptly (and happily) eliminated once he no longer had a need for him. He even extended an offer to Gogeta to take the Omni-Kings down together, showing he was willing to not only disregard divine allies but team up with enemies to achieve his goal (ironically, Gogeta was using a divine form at the time).

Hearts weep for the people of Earth upon learning their simple desires

Although Heart's misguided beliefs and hypocrisy led to him killing countless people to achieve his goals, his intentions of freeing mortals from the gods did seem to be genuine, as he becomes saddened and even cries when he learns that the people of Earth do not crave freedom after hearing their thoughts.

Voice: Anime Voice Comparison- Dio Brando (Jojo's Bizarre Adventure) (youtube.com)