No, soft skills are not characteristics of a personality.
Personality characteristics (e.g. in the Big Five) describe stable, relatively unchanging characteristics of a person that shape their behavior, thoughts and feelings across different situations. The use of personality characteristics brings with it significant disadvantages:
low observability
subjectivity of self-reporting
context dependency
lack of validity and reliability
inflexibility of characteristics
In contrast to action skills
Personality characteristics change only slowly and therefore offer little scope for targeted development - in contrast to action skills, which can be trained. Action skills are concrete, learned competencies and skills that enable a person to successfully complete specific tasks or challenges. The focus on action skills ensures more objective decisions and promotes the long-term fit between candidates and companies.