The entertainment personality 'Sandra Osei' who appeared in 'To Be Better Or Bitter' could not be verified based on the provided information and search results. There is a Ghanaian actress and media professional named Sandra Osei-Nti, known for films such as 'Baby Is Coming (2019)', 'Till Deaf Do Us Part (2023)', and 'Girl Talk (2024)', and her role as Content Acquisition Manager at TVAnywhere Africa. However, she is not associated with the movie 'To Be Better Or Bitter'.