Not every first impression numerology assigns is about charisma. Personality number 4 sits at the more grounded end of the scale — the read a stranger gets that this particular person is unlikely to flake, exaggerate, or overpromise.
That read tends to echo the same structural theme found in 4's destiny and soul urge profiles: order, groundedness, a preference for substance over flash. What's distinct here is that it's specifically about how that steadiness registers to someone who's just met the person, rather than what the person privately wants or where their life is heading.
As with every personality number, the honest caveat applies: this describes a first read, not a guarantee. Plenty of people who come across as steady on meeting turn out to be anything but, and vice versa.