Finny-Fingers was a great sea monster, a Rokea from Megalodon stock, and arguably the oldest sentient living thing in all the world’s oceans.
Finny-Fingers fell in love with Lilitu, from what began as feelings of camaraderie and association. He empathized with Lilitu’s attachment to the Wyld, her selflessness, her hunger, and her ancient knowledge of the sea. For his loyalty, she made him the first Sword of Shadows, at first to protect his heart from the Wyrm’s grip but then, to embolden him with his own love and make him her tool against those who would exploit the sea in the name of the Weaver.
His hatred and jealousy of Jonah pushed him to reject everything he cared about but with the blessing of the Sword of Shadows’ protective enchantment, he never fell to the Wyrm. Instead, his Rage burned inside him ever stronger, driving him mad (well, even more than spending millennia talking to the Wyld’s most powerful minion).