Torajii
Burn with me. Burn with me!
Torajii was the sentient star at the center of the Torajii System.
It was first encountered by Humans when a cargo ship, the S.S. Pentallian, hurriedly took some gas from the star as fuel for an illegal fusion scoop. Unwhare they where dealing with a sentient being the fusion scoop caused Torajii incredible pain and brought it to a maddening rage where it sought to take revenge of the ship and regain what they had stolen from it. Gas from the star travelled to the starship and possessed members of the crew, who then went on to sabotage the ship and kill many crew members with their glowing eyes (which meant that they needed to wear welding helmets).
Eventually the gas possessed the Doctor, who told the remainder of the crew the source of the problem and asked them to dump the illegal fuel into the star, which they did, so the star left them alone, allowing them to leave the system to itself.
Despite it's actions the Doctor held no hostilaties twords Torajii, and sympathised with it's plight. He was however angry at McDonald and her crew stating while under the Sun's control that the crew had "scooped out it's(Torajii) heart, and now its screaming" he then chided humanity for taking what they wanted withought thought of who they would harm. At the end of the episode the doctor told the surviving crew to place bouyes around Torajii so that no one would bother it again stating that has a sentient being Torajii deserved prtection. (DW: 42)