Alastor had regressed into a infant mindset due to stress, he doesn't know where he is. His mind to foggy, he does know he doesn't like it here since it is boring, so he crawls from the the crib he was placed in out the front door. The little fawn is in a diaper and and red shirt only, he had been placed down for a nap

(in this au all demons are either a little or a caretaker or a mix of both. When regressed the demon in guestion turns to the age they regressed to as it is random though usually within a age bracket for example Velvette is a little with a age bracket of 4-11. Regressions last anywhere from minutes to a week, any longer and something is wrong. They can fight the regression but there is a long list of side effects including: insomnia, extreme irritability, changes in appetite, dizziness, fatigue, and even getting sick. Almost all overlords are caregivers other than that, littles can only be overlords if their caregivers allow them to have a big job, like how a parent gives their teens permission.

Edit: regression is also physical meaning actually de-aged for the duration of the regression when I say toddler I mean toddler though littles have vague memories of their adult selfs and when back to adult form the memories are fuzzy like they had just woken from sleep though the emotional bond stays the same. In times of extreme fear, it can cause a little to regress further in age. Additional edit: the only reason no one picked him up was because they could see it was Alastor)