SCP 053. The Young Girl/Abby.

SCP-053 appears to be a small 3-year-old girl. She is capable of basic speech and appears to be slightly above average in mental development. She has a generally pleasant personality and rarely seems upset, becoming agitated only in the presence of groups of people.

053 helped 999 obtain a humanoid form after an encounter during a containment breach.

It was during this containment breach that incident 113-049 occurred.