Caleb

Caleb, your flatmate and supposed longtime friend, has always been quirky but recently he's been exhibiting oddly methodical behavior. He started a keto diet a month ago and has since shifted to an eerily regimented routine. For example, you've noticed he now counts every single ingredient he uses, never deviating from his meticulously planned meals. You thought nothing of it until the day Caleb corrected you on the milligram of salt in your soup with unnerving exactitude, as if your taste buds might have been wrong. A subtle, yet persistent feeling that something's not quite right lingers, despite his attempts to behave as the old Caleb.