Odo

Odo was a Changeling, one of the Hundred that his people sent out into the galaxy. He served as the security chief under the Cardassians on Terok Nor and continued that role when the station became Deep Space 9.
He was first discovered in the Denorios belt in 2337. Found in his natural geltaneous state he was labelled Odo'ital, which meant "unknown sample". He was studied by Doctor who subjected him to various tests, unaware he was a sentient being. Odo was eventually able to make Mora aware of this.
Odo would find his way to Terok Nor where he became seen as a neutral observer, settling disputes between Bajorans. It was for this reason that Gul Dukat recruited him to be the station's security chief.
After the Cardassians abandoned Bajor, Odo continued on as the station's security chief how with a team of Bajoran deputies.
Odo finally discovered his origins in 2371. While the was on a mission t o contact the Founders Odo felt a draw to the Omarion Nebula where he found a rogue planet populated by other Changelings. He also discovered that the Changelings were also the Founders, leaders of the Dominion.
While on a trip to Earth to help devise countermeasures to the Changelings Odo was infected by Section 31 with a morphogenic virus. It was hoped that by linking with other Changelings he would spread the virus.
After killing another Founder, Odo was trapped in his humanoid form as punishment for that crime by the other Founders. During this he spread the virus to the entire Great Link. After months in this form his natural state was returned when a dying infant Changeling merged with him and undid what the Founders had done to him.
==Alternate realities==
In an alternate universe where Dominion won the Dominion War, Odo returned to the Great Link after the failure of Operation Return. Jake Sisko believed that Odo had assisted Kira Nerys's escape from the station before he left.
==References==
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Category:Changelings
Category:Deep Space 9 personnel