The phrase "a substantial character" is correct and usable in written English.
It can be used to describe someone who has a significant or noteworthy personality or presence.
Example: "In the novel, the protagonist is portrayed as a substantial character, whose decisions greatly impact the story's outcome."
Alternatives: "a significant character" or "a noteworthy character".
Further assistance of a substantial character would make a vast difference in the immediate prospects.
Madeline, glimpsed only twice in the original tale, here becomes a substantial character, before her lurid zombie-type reanimation.
Knowingly furnishing false information of a substantial character to an office or official of the Law School, or to a properly identified University official.
Jennifer Connelly, as Noah's wife, becomes a substantial character, posing questions for the patriarch and acting in effect as his suppressed conscience.
Italy, a substantial character in this film, its landscape largely intact from the Renaissance paintings which celebrate it, its history as the artistic and classical heart of the Continent, has particular appeal.
This stark real-life example would have added weight to Munich's theme of the uncertainties of spycraft – and to the story of Salameh (Mehdi Nebbou), who is a substantial character in the movie.
The following year provided a more substantial character as Rabbitzn, in A Price Above Rubies, an intriguing feminist assault on orthodox Jewish life in Brooklyn.
Kurosawa adds his own twist to the story - his film does not finish, as In a Grove does, on the dead man's confession, but turns the woodcutter (who amounts only to a few lines in the original) into a more substantial character.
Despite these built-in handicaps, Miss Agutter make Ann a surprisingly substantial character who has just one, inexplicable, weakness.
"There's a serious and substantial character question about her, because the question becomes, 'Who is Christine Quinn, and what, if anything, does she believe in?' " said Norman Siegel, the civil liberties lawyer.
It is legally equivalent to a civil action of debt upon the statute, and its substantial character is not changed by calling the default a misdemeanor, and providing for its prosecution by information.
