Complex sentence: When Kasturba died in prison, Shanti Kumar was among the few close aides, who was allowed inside the prison and was present with other few pesonalities Lady Premlila Thakersey, Kanu Gandhi, Kamal Narayan Bajaj with Mahatma Gandhi at time of his profound grief.
Split into simpler sentences: When Kasturba died in prison, Shanti Kumar was among the few close aides, who was allowed inside the prison. He was with other few personalities like Lady Premlila Thakersey, Kanu Gandhi, Kamal Narayan Bajaj with Mahatma Gandhi at time of his profound grief.