Is the PIP person female? If so, I'd advise her to just let any complaints about her "personality" just turn into white noise, after, of course, pointing out that men are almost never coached on their "personality" because all those traits people think are nasty in a woman are admired in a male. Ugh, it's so tiresome.

If it's a male, then wow, he must be a REAL jerk to inspire that kind of feedback. Most males are rewarded for being abrasive and domineering.