The phrase "a character described" is correct and usable in written English.
It can be used when referring to a character that has been depicted or detailed in a narrative or analysis.
Example: "In the novel, a character described as brave and selfless becomes the hero of the story."
Alternatives: "a depicted character" or "a characterized figure".
His gang kidnaps a character described in the production notes as "the smoldering Perdita".
Coincidentally, Hagman is making a guest appearance on Desperate Housewives as Frank, a character described as a "grumpy racist OAP".
Indeed, while still at Columbia, Salinger wrote a story, The Young Folks, that included a character described as a prototype of Sally Hayes (Holden's old flame).
One of the men falls for the beautiful teacher Rosinha, muse of the local samba musicians – a character described in one contemporary review as "a rare flower, who preserves her beauty among those perverted people [of the favela]".
"Her" stars Joaquin Phoenix as Theodore Twombly, a character described as "a complex, soulful man who makes his living writing touching, personal letters for other people," the Film Society said in a news release.
"Derek," which makes its debut Thursday on Britain's Channel 4, stars Mr. Gervais in the title role, a character described on the show's Web site as "a tender, innocent man" who works in a nursing home.
In his 1941 novel, "The Last Tycoon," F. Scott Fitzgerald had a character describe Hollywood as "a mining town in lotus land".
A character describes seeing the American highway sign on Interstate 10 that directs Californian drivers to destinations beyond Palm Springs.
In "White Teeth," a character describes Archie's daughter Irie as someone who "swallowed an encyclopedia and a gutter at the same time".
In Godard's "King Lear," from 1987, he has a character describe editing as "handling physically, in both hands, the future, the present, and the past".
At one point a character describes him as "sorta sad, sorta unknowable in the way that you imagine reclusive, rich, eccentric men to be".
