Leilani, the sister planet Delaya's capital, was closely associated with Alderaan. The city was characterized by its numerous anonymous duracrete factories, which generated significant air pollution. Its landscape was marred by cramped roadways and numerous incomplete construction projects.
Following the destruction of Alderaan not long after 0 ABY, Alderaanian refugees, lacking the financial means to depart, overwhelmed the city. To assess the refugee situation and enlist fresh recruits for the Rebel Alliance, Princess Leia Organa made a trip to the planet.