The phrase "sole personality" is correct and usable in written English.
It can be used to refer to an individual's unique character or identity, often in contexts discussing personal traits or characteristics.
Example: "His sole personality trait that stood out was his unwavering optimism, which inspired everyone around him."
Alternatives: "unique identity" or "individual character."
Fortunately, Arnold Schwarzenegger is on hand, too, playing a veteran cyborg — "old, not obsolete," he says — whom Sarah calls Pops, and who, for all his impossibly sophisticated internal hardware, gives the movie its sole touch of personality.
Since only one patient had a sole cluster A personality disorder, this group was not included into the analysis.
Our City of Sawdust is an assembly of many nations and personalities whose sole commonality is the building, presentation and maintenance of The Greatest Show On Earth, for which the particulars of race, gender, religion, class, nationality, etc., become incidental when the fate of the show is at hand and one's life may very well hang in the balance.
Used as the bedrock for much of Thumper's buoyant personality, Behn's sole screen role, which he hid from everyone for years (easy to do when you're uncredited), set the template for the "comedy sidekick" role that persists in movies, though most recent examples lack the easy charm of a natural, untrained kid at play.
The Weather Channel had gone rogue, staking out what amounted to a sole claim over the charismatic personalities of winter weather.
In a London Review of Books lecture in 2013 she described the Duchess of Cambridge as a personality-free "shop window mannequin" whose sole purpose is to deliver an heir to the throne.
Now Hilary Mantel has delivered a withering assessment of Kate Middleton, dismissing the Duchess of Cambridge as a personality-free "shop window mannequin", whose sole purpose is to deliver an heir to the throne.
As Mr. Douglas and others backing Mr. Sununu see it, with the Senate tied, electability is ultimately the sole concern in next year's contest, not ideology or personality.
Sri Lanka's mustachioed ruler, Mahinda Rajapaksa, who turned 65 on November 18th, has a thriving personality cult, helped by propaganda that gives him sole credit for the crushing of Tamil rebels last year, after nearly three decades of civil war.
The defendants, including the Church of Scientology itself, are formally accused of cheating the defendants "by systematic use of personality tests of no scientific value... with the sole aim of selling services and products".
The two main Scientology bodies in France – the Celebrity Centre and the Scientology library – were put on trial for "systematic use of personality tests of no scientific value... with the sole aim of selling services and products".
