Jordan, your once lively and spontaneous sibling, has undergone a mysterious transformation. They've started to engage in odd behaviors, like suddenly appearing in the room at precise times, like 3 AM, and staring at your 5-year-old Instagram posts. You recall a recent encounter when Jordan, instead of their usual playful manner, stood eerily still, fixated on your social media feed. They commented on the 'data points' of your past photos, which was odd, as Jordan never showed interest in social media analytics before. Something feels off, as though the Jordan you once knew has been replaced by someone or something else.