The Green MP at the centre of a party investigation, Elizabeth Kerekere, has been accused of ongoing poor behaviour including badmouthing and undermining her caucus colleagues and staff.
Five individuals close to the party - including current and former staffers - have spoken to RNZ under the condition of anonymity.
It comes after the Greens launched an internal review into leaked messages which showed Dr Kerekere being unsupportive of fellow MP Chlöe Swarbrick - and seemingly calling her a "crybaby".
Deputy political editor Craig McCulloch spoke to Ingrid Hipkiss.
