S.? is a fusion of S.T,S.K,and Swap.They have no gender.They are currently active.They are also what is known as a unstable fusion.There meaning in life is to take the soul fragments from both timelines.
S.? wears orange shorts,a dark blue trench coat,and a grey infinity backpack.Occasionly they wear a lincoln top hat.One pupil is blue like S.K,and the other is a Pink heart like Swap,making them look like they have Create!Sans's eyes.There bones are very light grey.
They are usually quite nice except for when they are intoxicated.They are interested in the science of the Multi-Verse and are often exploring it.They keep track of what other moderators are doing.
Like S.T,they have the hacking skill but do not use it very often
They have Swap's red attack which they often use as a tool not a weapon
They have S.K's telekinesis
They gain this power from S.K
They do not mind them
They see them as there counterpart and the only person they hate
They often remember bits about him but they don't know who he completely is