The phrase "hard character" is correct and can be used in written English.
It is typically used to describe someone who is difficult or unyielding in their personality or behavior. Example: "John was known to be a hard character, never backing down from a challenge and always speaking his mind."
"Shane is quite a hard character," he says.
Desorption is then explained with a higher "hard" character of mercury at increasing negative potential.
He was an intriguing character to watch, but no doubt a hard character to embody — or live with.
Karen's relentless self-doubt and hypocritical attitudes to race and class make her a hard character to sympathize with.
Why else is "Old Yeller," an iconic American movie, recalled when filmmakers want a hard character to reveal a heart?
Mr. Coll and his phlegmatic research assistants have interviewed more than 400 people, including Exxon Mobil's longtime chief executive Lee R. Raymond, a legendarily hard character.
Griff lives in a trailer in Iowa with her mother and her mother's boyfriend, all hard characters in search of peace.
"There was a still, Magritte-like light hanging in the sky and these two cold, hard characters at the front, staring at a burned-out church.
I get to play a lot of hard characters and some people perceive that's what I'm like, but it's great for me 'cos they're always the most interesting characters.
Beresford says he was the hardest character to recapture, not least because: "In Wales, they still talk about Mark Ashton as if he were Joan of Arc".
— Michelle Duque, Colombia MR. LLOYD: The hardest character to write for used to be Lily, until this year when she became kind of wizened and conspiratorial and now she's almost as much fun to write for as Phil.
