The "Star Poet" was a female Arcateenian known to Sarah Jane Smith. Having gotten lost, the Star Poet located Sarah Jane, who gave her directions back home. In return, the Star Poet gave Sarah Jane a contact to help her with writing her poetry. Maria Jackson saw Sarah Jane with the Star Poet in her garden. This was the first alien she ever saw. (TV: Invasion of the Bane)
Star Poet was one of the aliens who were caught by the Krulius. She was released by Clyde Langer and Rani Chandra. (GAME: Monster Hunt) However the Krulius had managed to take clone cell samples of his former captured aliens with him, which allowed him to grow copies of these aliens, which were all completely in his power. (COMIC: Return of the Krulius)
Behind the scenes
An action figure of the Star Poet alongside Sarah Jane Smith was released by Character Options as part of their range based off the first series of The Sarah Jane Adventures.