" guileless "

1: free from any intent to deceive or impress others;

  * e.g., " ... she was an easygoing, guileless young woman who was comfortable just being herself "

•  Synonyms : 

•  artless,

•  genuine,

•  honest,

•  ingenuous,

•  innocent,

•  naive,

•  natural,

•  real,

•  simple,

•  sincere,

•  true,

•  unaffected,

•  unpretending,

•  unpretentious

•  Antonyms : 

•  affected,

•  artful,

•  artificial,

•  assuming,

•  dishonest,

•  dissembling,

•  dissimulating,

•  fake,

•  false,

•  guileful,

•  insincere,

•  phony,

•  pretentious