Background for MOTW character

For those that don't know I play DND and other TTRPG. I'm in a Monster of the Week game and I play a Eldritch Being from the ocean (akin to a leviathan or kraken) named Tehom. He is almost as old as the earth itself, he first came onto the surface around what would be considered the Biblical time period. He has a proper form, huge and all tentacles, but on the surface he takes on a human form (which has two version, one is fully human and the other is a human body but with a squid-like face as you can see in the art below). He's a Spellslinger by the rules of the game. The game is set in modern time and he works as part of a organization called "The Catalogue" which deals with anomalies, non-human people (like Tehom) and cryptic's to determine if they are a threat (like a cryptic FBI). He works with two coworkers, a werewolf and a human possessed by a computer spirit. I love my squid boy, he's basically a Eldritch Being who doesn't understand technolog...