Another word would be forthright.
What Is One Word For "Brutally Honest"?
Blunt
Real.
I would suggest "straightforward" or "frank."
I'm just saying! O.kay. But my guess would be "sister"... (smile) lol. I'm just kidding. This was a hard question to resist for me with this answer floating around in my head! Lol. "sister" all the way for my answer. In my opinion. (smile)