The five is Mercury, the sign of movement. Such a person needs freedom: to move about, to change occupations, not to be bound by obligations they did not choose.
They grasp things quickly and switch easily, but depth comes to them less readily than to Jupiter: where Jupiter carries a thing through to mastery, Mercury more often stops at a working level and moves on. Professionally this often takes them into trade and brokerage — take what already exists, rework it to fit the task and pass it on.
In relationships, long commitments come hard if the person beside them keeps a different pace. Mercury stays where nobody holds on to it — and leaves wherever anyone tries.