Elena is a Cygnian/Orion hybrid - a unique combination, as far as she can tell. She is an incredibly talented pilot and tactical officer, with a unique set of skills from her heritage that provide her with an edge in both. However, she is an inexperienced and often unrefined officer, with a litany of mistakes and infractions seeming to follow her everywhere.
Ghyslaine always has a smile on his face, some esoteric historical anecdote for the situation, and an offer to help. Born into the Fleet, he has spent the vast majority of his life aboard ships and still chooses to do so. From his early career in the Dominion War, to his long academic career in the Sciences division, he is proud to be an officer and to follow in his parents' footsteps. He has a drive to excel, and a belief in the Federation that seems impossible to suppress. It shows. It isn't every day you see an Anthropologist leading a science department aboard an explorer.
Sun Mei Xiang is a historian, a martial artist, a former marine, a fighter pilot, and proudly serves as the Commanding Officer of the USS Shanghai-A. Starting her career as a Marine Fighter Pilot, she is not a traditional Starfleet Captain - and had to learn command in a much more round about way than many officers. This gave her a unique, if often less than polished, command style.