eccentric
ec-cen-tric
noun
A person with unusual or unconventional habits or behaviour.
"The old man was a well-known eccentric."
adjective
Behaving in an unusual or unconventional way, often considered charming or harmless.
"Her eccentric uncle collected antique teapots."
Thesaurus
Synonyms: type, character, case, eccentric person, oddball, geek, flake, freakish, outlandish, flaky, unconventional, bizarre
Antonyms: concentric, concentrical, homocentric