Ches'sarro Seeto was a Bajoran alive during the 24th century.
During the Cardassian Occupation of Bajor, Ches'saro was a collaborator. A list hidden by Vaatrik Drasa in his chemist's shop on Terok Nor listed Ches'saro's name first.
In the year 2370, Rom tried to remember the list, and got the name as Ches'so. Major Kira Nerys was able to determine as Ches'sarro. Soon after Odo began questioning Vaatrik's wife about Ches'sarro, Ches'sarro was murdered. (DS9 episode: "Necessary Evil")