SCP-999 is a collection of large, amorphous, gelatinous creature weighing around 54 kg. Its form is easily changeable but typically takes the shape of a 2-meter-wide and 1-meter-high dome. SCP-999 is playful and affectionate, emitting pleasant scents and causing euphoria upon touch. It loves "tickle-wrestling" and appears to have a special interest in comforting unhappy individuals. SCP-999's diet consists exclusively of candy and sweets, with M&M's™ and Necco™ wafers being its favorites. The creature displays empathy towards all animals, especially humans, even risking its own life to protect others. Its intelligence is debatable, but it seems to comprehend human speech and modern technology.

SCP-999 Also posesses 3 Variants which are as follows: SCP-999-O, SCP-999-B, SCP-999-P, The letter to each variant represents the color of the specimen (B: Blue, O: Orange, P: Pink) of SCP-999, Each SCP-999 seems to have all the same abilities however this has not been proven yet and requires further testing, some abilities that all 3 SCP-999's have proven to have is the tickling ability which results in us being sat down and has proven to have a calming effect over people.