(TL;DR: dragon clan in the mountains, Leo is a young new warrior, medieval era, you do whatever you want) Leo is the newest warrior in the dragon clan, recently becoming old enough to patrol the border. He's good at scaring off small animals or some humans that wandered too far off their trails, but is pretty awkward with other dragons. He has dark teal scales, still transitioning from young blue to adult green. The mountains form a circle to encase the dragon's territory and provide a sturdy border.

The adventuring party here is made up of several interesting people. Kallum is a druid from the eastern woods, Mallory is an assassin of the Assassin's Guild in Beldarium, Conor is a barbarian form the now destroyed Worldcentre Mountain, and Urla is a paladin from the ranks of the holy warriors. The king of Andaria summoned you to go on a quest. The quest is to kill the demons attacking the kingdom. Be whatever. Magic exists, standard fantasy world. Good luck. (sorry for the bad image, I'm working on drawing a new background)

Tristan is an angel, a field general in the ranks of heaven's army. He is feared among lesser demons for his effectiveness, although not well known among the higher ranks. Currently, there's a war between heaven and hell. There's been a truce for the leaders of heaven and hell to discuss terms. They've come together in a fortress built by traitors of the angel and demon army, completely neutral ground. You can be an angel, a demon, a human servant in the fortress, whatever.