mhm!! Thank you for the hearts!! :]

• They usually regress to.. well. Exactly be 4. Ironically enough. It's their set number, and it sticks to them pretty easily.
• They tend to hide away from others, and tends to regress by themself when stressed or faced with their hardships. They get scared of others seeing them regressed in most situations, so they make sure that nobody can get in. It's debatable if they even let X see them, perhaps only in situations where they really really need X's support.
• Their main way of calming down is binging BFDI, which they find the most comfort in. They honestly do that no matter what age, but it makes them so much happier when regressed.

• They love things that are cozy and warm, as their own body probably has a hard time regulating to the temperatures of wherever they are.

• Their powers are especially out of control, and if you're lucky enough to be able to be in a room with them, watch out. It can be very dangerous.

• Talking about being in the room with them; X is usually the only one allowed to be with him, the only one Four trusts. Four enjoys physical contact from X which is mostly just hugs and general body contact.

• They're mainly silent when regressed, only speaking a few words occasionally.