|Range||U+FFF0 - U+FFFF|
Specials is a short Unicode block allocated at the very end of the Basic Multilingual Plane, at U+FFF0–U+FFFF. Of these 16 code points, five are assigned as of Unicode 12.0:
U+FFF9 INTERLINEAR ANNOTATION ANCHOR, marks start of annotated text
U+FFFA INTERLINEAR ANNOTATION SEPARATOR, marks start of annotating character(s)
U+FFFB INTERLINEAR ANNOTATION TERMINATOR, marks end of annotation block
U+FFFC ￼ OBJECT REPLACEMENT CHARACTER, placeholder in the text for another unspecified object, for example in a compound document.
U+FFFD � REPLACEMENT CHARACTER used to replace an unknown, unrecognized or unrepresentable character