Usage patterns
〈人〉に品格があるsomeone has dignity/class
She has a natural sense of dignity.
品格に欠けるto lack dignity/class
The remark was criticized as lacking dignity.
品格を保つto maintain one's dignity
It's important to maintain your dignity even in difficult situations.
品格を漂わせるto give off an air of dignity/class
The venerable shop's appearance gives off an air of dignity.