Sorta how Skyra's body is. Skyra is larger and obviously in control, while Iris is mostly separated and can remove herself. Vex is mostly part of Skyra and can be removed for periods of time but must return. These are my 3 main OCs.
Vex is mostly a sort of "tail" which has it's own body and no eyes but when allowed can see through Skyra's eyes. Iris is almost a completely different creature however is linked to Skyra and they can communicate through any time and space through telepathy. Skyra is the main, devilish creature. Iris is mostly separated because of the emotional differences between them.