Felix/Sheba: He saved her from the lighthouse. Nobody jumps off of a lighthouse into the ocean for the simple reason of needing a Jupiter adept for later^^ Lighthouseshipping. My name: Erosionshipping.
Isaac/Jenna: I just like it^^ Can't tell ya why. Valeshipping
Garet/Jenna: They seem to flirt a lot, and are good friends. Besides, Garet seems so broken about Jenna being kidnapped. Flameshipping.
Piers/Jenna: Nothing I can say except they're kinda cute together, not to mention it would be forbidden. I like that kind of romance^^ Spashipping.
Piers/Mia: Just an old favorite. Mia needs a shoulder to lean on after learning of Alex's betrayal, and Piers knows about betrayal. Aquashipping.
Isaac/Mia: Mia is broken up over Alex, Isaac is broken up over Jenna. They heal together^^ Mudshipping.
Felix/Karst: His first love, her only love. Karst is a bit... Explosive :P Moltenshipping.
I actually like almost every pair... Except for Ivan/Sheba...