I can't believe I forgot to introduce the OG: my first DND character Ice Storm, who was in fact based off an old dragon OC, then she had 2 different iterations of DND dragonborn. Here's some art and lore of the latest iteration:
Ice Storm, dragonborn drakewarden ranger, was my character from a now finished campaign, in a separate universe from the rest. She was the heir to the throne of her clan, which she didn't want, but preferred it over her family's tyrannical rule. But her family had other plans and cast her aside. She was exiled and teleported somewhere far away. Here, she was hoping to recover, and either move on, or return to face her family, but she was left with no choice when this new land was suddenly invaded by blood monsters. She joined forces with some random people to survive, navigate the land, take on quests to make some cash, and gradually aid in destroying the cult of Bhaal, the source of blood monsters and blood rain plaguing the island. Which in the end was successful. Somewhere along the way, she developed an aberrant dragonmark, maybe related to her heritage but still unknown. The campaign was finished, but I have yet to come up with a personal conclusion for her, and there was a personal side plot that wasn't finished.
She also has a draconic spirit companion manifested as a small drake, called Lantern Light. He grew over time until he became a majestic dragon. He's summoned by an item signaling dragonborn leadership in a clan, which Ice Storm got her hands on after some complicated family drama, but she had no idea of what it truly did.
In the first iteration she was a Druid circle of stars. She was my first ever DND character, and initially I wanted to make a completely new design, but somehow I got the idea to reuse an old character design and turn her from a dragon into a dragonborn. I briefly wanted to do the same with other old OCs, such as Silver Claw (her evil sister), Frozen Ocean (who was meant to be her girlfriend) and Eaticx (who was meant to be her child). Eventually I decided that only Silver Claw existed in the DND universe to avoid confusion. However, later in the second iteration, Frozen Ocean does exist as well but I didn't establish relationships or lore. Anyways, in the old iteration the backstory is pretty similar but the actual campaign premise was different. She was still teleported against her will to a random place (now different), and she lived like a hermit for years, learning the ways of the druid from another dragonborn called Token, who eventually died. She later got the courage to interact with civilisation so she joined an adventurers' guild, hoping to learn more about where she is and how to get back home. Or maybe forget it all and live a new life? Anyways, she's just been adventuring with various people, and making some money.