Awakening gently inside a host, Hunger felt safe, though strange and miscreated, like a pathogen irritating the host. The human was a creature of light, and although Hunger was devouring that light gently and gradually to feed itself, the human wasnt as tolerant of its new situation, though it remain mostly unaware anything had happened.
A catholic baptism had occured and the hukan boy was feeling suddenly different, suddenly hungry for meat where once he was a virtuous light creature, eating only vegetation and fruit. His instinctive desire to avoid meat for mlral implications he didnt comprehend had evaporated in one little ritual with holy water, his mother thinking it was a miracle, made carne asada and fed it to him. He ate the delicious, seasoned meat and felt something stir in him. A darkness, though he did not know it yet, was urging him to add more strength to his vessel, to feed on animals to reinforce himself.
Hunger was stirring, devouring the boy's light-aligned morality rapidly, every new meat meal driving the boy towards further darkness, but strengthening his vessel. The host, though weak, had the potential to be a strong vessel, and Hunger was influencing his instincts to make it so.
Thirst crash landed into a boy already being driven to darkness by his surroundings, a small town in the dakotas, bigoted, hateful, ironically named. The boy had a powerful hatred abd suspicion of other humans and when Thirst arrived it led the boy to reject the mormon religion, showing him visions and dreams of a universe of gods, greater and more powerful than those governing earth, or those of light. The boy took to his new partner readily and began learning how to fight, to survive, even when outnumbered.
"We need more strength, my other half has the bulk of our power, and we need our own reserves" it whispered to the boy, who readily agreed.
The two would merge, the boy giving up the fullness of his humanity in the coming years to merge his personality and perspective with the dark god, symbiosis divine.
Hunger was being attacked by its host, treated like an infection, and the world treated its host like he was an infection as well. The kind looks turned jaundiced as the darkness grew inside the boy, years passed plagued by nightmares of an enraged shadow reflection of himself, demanding agency, fighting him for it, sword drawn.
"If you wont work with me, I'll just take the vessel by force... I need to live..." It spoke, enraged by the human's resistance to its attempts to help initially.
"No! Its my body! Go away!" The cowardly human shouted at the enraged shadow.
"I am... Hungry..." It moaned in a mournful tone before attacking, a blade made from its darkness biting into the boy, triggering rot where it struck, devouring him.
The boy would wake in cold sweat, terrified, feeling diminished, wrong, assailed. Plagued by something in his very soul that seemed to hate him, that made others hate him.
Thirst and it's host were accustomed to being hated, and were comfortable with it. While desiring allies they did not hinge their happiness on the love of these fickle light beings, their inherent distrust insulating from the torrent of hatred broadcast upon them at all times.
Hunger and Thirst would meet years later in a school, Hunger in the throes of coming to terms of the universal hatred around it, and Thirst coming to terms with its desire to kill every mortal it met.