As the largest prison in not only the Kunan region but the entire Toran Republic, Soniere Prison serves an important role as the maximum security prison, used to hold serious criminals such as murders or political prisoners; criminals convicted of lesser crimes are usually sent to the Banaar Mines for forced labour. It was built in SY 347, built by the inmates of Gaya Prison; they were then transferred to Soniere Prison themselves, and Gaya was destroyed in favour of Soniere's use.