noun
straight shooter; frank person; person who tells it like it is
Describes someone who speaks their mind directly and honestly, without sugarcoating. Often used with a positive or admiring tone.
彼は直言居士で、思ったことをはっきり言う。
He's a straight shooter and says exactly what he thinks.
直言居士の彼女
Being a frank person, she doesn't hesitate to give her opinion even to her boss.