Rondon is a Zaldan at the Relva VII testing facility whose angry confrontation with Wesley Crusher turns out to be part of the Starfleet Academy entrance examination.
Rondon appears in Coming of Age. Wesley Crusher, sitting the Academy entrance examination on Relva VII, bumps into the tall, short-tempered Zaldan in a corridor and is loudly challenged over it.
Wesley notices Rondon's webbed fingers and recalls that Zaldans regard courtesy as a form of dishonesty that hides one's true feelings. Instead of apologising, he answers with equal rudeness, and Rondon goes away satisfied.
Tac Officer Chang later reveals that the encounter was staged to see how candidates deal with other cultures. Wesley handles it well, though the single place at the Academy goes in the end to the Benzite Mordock.