Kamara is the first woman from Sierra Leone to compete in the Miss Universe pageant.
Representatives from Thailand, US Virgin Islands, Brazil and Guyana have also arrived in Manila to prepare for the international beauty competition.
The coronation day of the 65th Miss Universe pageant will be held on January 30 at the Mall of Asia Arena in Pasay City.
Philippine bet Maxine Medina is hoping to follow in the success of her predecessor Pia Wurtzbach, who was named Miss Universe 2015.