Aware that his true form will lose her forever, he is unable to grant it right away; he spends much time trying to decipher human love in order to "make" Lisa truly love him, and in the process he develops feelings for her.
Aware that his true form will lose her forever, he is unable to grant the third wish right away. The Djinn spends much time trying to decipher human love in order to "make" Lisa truly love him, and in the process he develops feelings for her.