I'll go first. He's a reborn necromancer wizard, with a 1 level dip into death cleric.
His backstory comes with a clichénwarning for lost memories..
He lost his memory just before the start of the campaign. He was conducting a gruesome experiment on a dog, when something went wrong involving lightning. He died, but also didn't, and came to wandering around his lab years later, clutching the skull of the dog, which had rotted away to just bone.
He didn't have a name at the start of the campaign. I let a different player name him, as his character knew mine from before the accident. He came up with the truly awful name Melvin Kingston, which I've grown to love. He had a massive fear of death, having died once already, and was quite the coward in early levels.
His memories have been slowly returning, and he's had to come to terms with all the evil things he did in his previous life. I recently took a level in death domain cleric, cos we had no healer, and I found the god Jergal, Scribe of the Doomed, who is concerned only with documenting the dead in his great book. Melvin's faith has allowed him to come to terms with death, and accept it as a part of life. (His newfound ability ro wear medium armor has helped as well, lol). I love having 8 cantrips, and so so many spells to choose from. I have so many options!
I love playing him, and I'm loving the progression he's gone through. I have more planned for him.
Now your turn!
For context: This campaign is set in Greek mythology years after the trojan war and a second kidnapping of Persephone has caused Demeter to cancel Spring again.
Meet Diomedes, the Unsung. He was a fearsome warrior and cunning strategist blessed by Athena herself in his prime years. Many of the great deeds attributed to other heroes (Oddyseus and Ajax for example) were his accomplishments, but success amplified his own hubris until the fateful day he offended Hera.
She sent her champions and creatures to smite Diomedes, but he bested them using his cunning. In the end he could not escape a curse causing him to be forgotten by any living being and that what he treasures the most (his glory) being given to others.
Being forgotten that way, Diomedes resigned himself to a peaceful, quiet and humble life watching over his descendants, who couldn't remember him.
And now with eternal winter looming he drags his old bones into the underworld to save his descendants (and by extension the world) from frozen misery.
Mechanically he is a Custom Linage (ambiguously human) Dirge Singer Bard (from Keith Baker's Exploring Eberron) with a reflavoured Strixhaven Student Background focused on supporting his unlikely comrades as much as possible. This old man has trouble hurting anyone by himself, but he is still a fierce and cunning commander.
The Dirge Singer Bard gets broad inspiration allowing him to inspire twice as many people at the cost of slower progression on the bardic inspiration dice. And at a higher level he can use his reaction to allow an inspired creature to make an additional attack.
Nice, I like when players tailor their character to the campaign like that