Though I personally like leokali more ship wise, I do believe both ships have their own personal pros that make them just that much more delicious! Think about it! Both Leona and Idia where probably one of the few students who would have been able to socialize with a young Kalim! I know Idikali makes less sense considering that Idia tends to slink away for people with personalities like Kalim, but is still think they would have been cute together regardlessly.
Imagine a little Kalim trying to become friends with two of, what I would consider, the antisocial party guests that have been invited to one of his families balls or such. Idia's family in my mind makes sense because his family is part of a larger company and enterprise, while Kalim comes from a long line of merchants. I wouldn't doubt that Kalim's family has their hands in a couple of different businesses and such, so it wouldn't be a stretch to see Idia's family trying to cozy up to Kalim's. With Leona, even though the Asims aren't technically royalty, they are still not only highly influential, but at the very least related to people who are. Kalim being able to met on or both boys at a party or such wouldn't be a far stretch. Not to mention I'm always a sucker for childhood friends aus...