Atypical
...not representative of a type, group or class.
unusual, uncommon,
unconventional, unorthodox,
irregular, abnormal,
anomalous, aberrant,
deviant, unrepresentative,
strange, odd, peculiar,
bizarre, weird, freakish,
eccentric, exceptional,
singular, unique,
rare, extraordinary,
freaky.
~ Jolie Élise