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Thirishar ch'Thane (Shar) was an Andorian chan and a former Starfleet officer. Shar was assigned to Deep Space 9 as the science officer following the Dominion War. Shar was assigned to the USS Defiant during the Gamma Quadrant mission, during which time he identified Yrythny DNA as possibly being a solution to the Andorian fertility crisis. This discovery, coupled with personal issues with his three bondmates over the sheltreth and their later deaths, drove Shar to leave Starfleet to conduct research into identifying a solution.