Sure thing!

Volkner and Elesa were both born in Sinnoh and Volkner is the elder brother by three years. Their father is a electrical engineer from Sunyshore and their mother is a retired actress. They were fairly close growing up, though didn’t have much in common. Volkner takes after their father and was interested in studying electronics, while Elesa was always captivated by their mother’s glamour while watching her films. One thing they had in common was a love for pokémon battles. Neither of their parents are particularly competitive trainers, so neither is sure where their children got it from, but both encouraged the two to become trainers if that was their dream. 

Eventually, as they grow up, the siblings go their separate ways – Volkner remaining in Sunyshore to study engineering and eventually becoming the Gym Leader, while Elesa moved to Unova to pursue her modelling career (and eventually becoming a Gym Leader herself.) They remain in touch, however, and still have a good relationship. They try to organize regular visits between their families, though this is difficult since they all have busy schedules. As for their children… Ronan doesn’t get along very well with Elesa and Skyla’s twins, but then again Ronan tends to be very aloof in general. He and Jerrie are rivals of a sort, usually challenging each other to a battle when they meet at family reunions or vacations.