relationships.
Akutare: Akutare, in a way, is her client. Rikku and Akutare both mutually agreed to film the one big blockbuster Big Mommy-infested Manhattan needs to see: something with bombs and explosions and romance and awesome. Their friendship doesn't go beyond that, but Rikku is awfully bossy towards him.
Apollo Justice: Apollo impresses Rikku because he's a lawyer, but she's quickly figured out how simple it is to walk circles around his head. She likes him because he's easy to read and hides very little, traits which Rikku admires in a person because she's just the same way. Now that he's gone home, she feels a little depressed about it.
Dante Sparda: Rikku's not the sharpest knife in the cupboard, so when she finally figured out Dante was flirting with her, her immediate reaction was dumbfounded shock. However, despite that, she doesn't think badly of him and tends to overlook most of his advances (all attributable to her skimpy choice in clothing) as nothing out of the ordinary.
Seymour Guado: Hate, thy name is Seymour. There's nobody in this world (or any other) that Rikku truly despises asides from this ex-maestor. She dislikes him especially for his manipulative tactics in this world, ignoring her when she points out that everything is fake; she's also annoyed by his Messiah Complex.
Tidus: Tidus is actually a friend from her homeworld Spira - sort of. Considering he's, well, just a dream and nothing real at all. Despite that, the last time Rikku saw Tidus was actually after the defeat of Vegnagun when he was happily reunited with her cousin, Yunie, and the rest, as they say, was history. The two have a brother-sister relationship, and Rikku is often exasperated with Tidus, though she's often guilty of the very same things.
Zack Fair: Her hunky partner-in-crime, one-half of their singing duo, and all-around fun guy. Rikku adores Zack for being just as fun-loving as she is and for indulging in her whimsies. He's nice, impulsive, and everything, in her mind, a guy and a friend should be. Now that she knows more about him, Rikku feels the same sort of "need-to-protect" obligation that she feels for Yuna, and she considers Zack her most important friend here. While it's safe to say that Rikku's feelings for Zack might be verging beyond friendship, she keeps them under wraps because of Aeris.