Tā shì gè zhíhuà zhí shuō de rén, cóng bù guǎiwān mòjiǎo.
He is someone who speaks his mind directly and never beats around the bush.
Tips
usage
Often used in the phrase 直话直说 (zhíhuà zhí shuō) meaning 'to say exactly what one thinks'. Chinese culture can value indirect communication, so 直话直说 can signal refreshing honesty or bluntness depending on context.