Candid
Part of speech: noun
Definition: A spontaneous or unposed photograph.
Part of speech: adjective
Definition: Impartial and free from prejudice. Straightforward, open and sincere. Not posed or rehearsed.
Example sentence: Dad never interferes in our personal matters. He is a very candid person and knows where to draw the line. He is always there for all of us in the family.
Ingenuous
Part of speech: adjective
Definition: naïve and trusting; demonstrating childlike simplicity; unable to mask feelings; unsophisticated; straightforward; candid, open and frank