Just made a new character for an upcoming campaign I'm really excited about. Wrote a little backstory and mocked up a picture:

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Edgar was a sailor from the small seaside town of Innsmouth. He grew up working on ships of all sizes: merchant vessels, fishing trawlers, and transports that would ferry men across any sea they damn well wished, for the right price. One fateful night, a calm ocean and clear sky suddenly wrought into a violent tempest that snapped their ship in two, leaving Edgar adrift in the inky black, struggling not to be buried by the waves. But what he saw in that darkness before the vessel capsized scared Ed far more than his current circumstances. Two glowing red eyes, deep beneath the waves. And a hand...reaching for him. The next thing Ed remembered was waking up in a vast, sunken city of strange, black buildings, somehow able to breathe. Somehow alive. Feeling himself drawn towards something, urged on by whispers deep inside his head. His memory after that is a painful patchwork of images, sounds, and feelings, stitched with the thread of overwhelming terror. The only thing certain is that a deal was struck. When he awoke, washed up on the shores of Innsmouth, Ed couldn't run home fast enough - he had no idea how long he had been away, how long since he had seen his wife and child. What greeted him was a macabre scene - profane symbols and a pentagram adorned the floor and walls, painted in blood. And there lay the pale bodies of his wife and son, drained of every drop. Noticing a robed figure in the midst of the madness, Edgar lashed out, overcome by grief. To his surprise a crackling bolt of blue lighting - fuelled by his anger - shot from his fingertips, mortally wounding the man. As Edgar approached to unmask him, the man screamed at him to stay back. But it was too late before Ed realized why. Stepping into the pentagram, a formation of crystals hummed with dark energy, and as the robed man's life force drained from him... it found its way into Ed. It was the second-most agonizing pain he had ever felt, behind that of losing his wife and child mere moments earlier. The agony of a second soul being forced into his body. And in that moment, Edgar swears he felt something else, something even darker - perhaps what this man has been trying to summon, slip in, uninvited. Immediately, Edgar found himself battling for control over his own thoughts. Then, his actions. The man he had just killed... the man who had killed his wife and child...was inside him. Part of him, now. Whatever amalgam of magic lay inside them grew unstable - fire, lightning, and things far darker began to spew forth, sending Ed's house up in flames which quickly spread to the rest of his slum, and then the city. Using every inch of his might to wrest control back from the intruder in his mind, who called himself 'Zed', (and whatever else may have found its way in) Ed fled the town he had once called home as it burned down around him.

Was Ed's story true - had he really encountered a being in the deep that bestowed strange powers upon him? Was the price of his pact the life of his wife and child? Who is 'Zed' and what was he trying to summon? And what are these strange scales that have begun to form on his skin? Or were these simply the ramblings of a madman who snapped one day and murdered his family, his personality splitting in two to cope with the grief? With the new visitors inside his head, Ed can trust no-one. Not even his own memories.

'Ed & Zed' are a level 1 Half-Elf Warlock with a pact with the 'Great Old One'.