The phrase "certain aura" means that someone or something has a distinctive and noticeable presence or vibe that can be felt or sensed. Full definition
There is a certain aura about being founded in a garage, whether you're a tech company like Hewlett - Packard or a rock band like The Replacements. (entrepreneur.com)
It doesn't matter if you drive a Harley or a Kawasaki, bikes have a certain aura that tends to make any man fall in love with it. (myntra.com)
The film was way over budget; there have been numerous rewrites with various screenwriters, reshoots with various cinematographers, etc... There is a certain aura that comes with films of this magnitude having a troubled production. (paulstriptothemovies.com)