Lucia (QueenChessmon) - Born to the royalty of the Black Chess Kingdom, Lucia rejected her teachings and upbringing, opting instead to daydream and wander the outskirts of the Chess Kingdom. She relished her sense of independence and adventure until she finally gathered the courage to leave the war behind and leave future rule to her younger sister, Victoria. In her travels, she ended up in the kingdom of Kaladesh, marveling at their innovative and adventurous spirit.
Duo (Gaiomon) - Born in the kingdom of Ama, Duo trained as a warrior from a young age to serve his father's criminal interests. He later sought to distance himself from his father by setting out into the world and fighting for something other than himself. While in Kaladesh he served as a soldier, keeping the peace during large festivals and revelries. It was at one such festival that he met and befriended Trowa. The two would later join with Lucia to travel the world.
Trowa (TigerVespamon) - Born in the magic and nature-haven of Glen Elendra, Trowa resisted digivolving out of his technology-based forms. He was impulsive and trigger-happy, which led to his banishment. He eventually settled in Kaladesh, where he would reconcile his interest in technology with his species predilection for elegance, all the while retaining his natural impulsive tendencies. There he partnered with Duo for a while until they met Lucia and, following her lead, ventured out into the world.
Justin (Justimon) - Born in the kingdom of Halcyon, Justin trained among Halcyon's warriors and became a Justicar - a martial judge. But he soon learned that there was a more personal side to every misdeed. Conflicted, he relinquished his post and left to find the greater truth in the world. In Kaladesh, he became rivals with Duo after a misunderstanding led to a battle between the two; a battle which Lucia quickly put an end to. Marveling at her sense of self, Justin chose to follow her out into the world.