WA senator Jordon Steele-John is being investigated over several incidents in which he is alleged to have behaved inappropriately toward women.
In an open letter posted to his social media, Senator Steele-John said "nasty political games" had weaponised elements of his personal history.
The 32-year-old also accused Greens leader David Shoebridge of effectively trying to force him to take leave from the party room when the allegations, which span nearly a decade between 2017 and 2025, became public.
"It was a bad call from David," Senator Steele-John wrote.
"To be clear, I am not on leave and did not agree to the inclusion of that line within David's statement."
But a spokesperson for Senator Shoebridge on Monday said he believed leave had been agreed to between the pair.
He announced the leave as a decision Senator Steele-John had made himself, along with confirming he would self-refer information to the WA Greens for investigation.
"Senator Shoebridge remains of the opinion that leave is appropriate under the circumstances and reiterates that this in no way prejudges any of the matters being referred to an inquiry commissioned by the WA Greens," the spokesperson said.
"It was the understanding of Senator Shoebridge that leave was agreed."
Senator Steele-John has vehemently denied any wrongdoing but said the circumstances had made it reasonable for people to assume guilt on his part.
That had occurred not just because of Senator Shoebridge's actions, he wrote, but as a result of broader factionalism in the party.
"This is an attempt to influence forthcoming party preselections by deliberately leaking out of context or misleading information to smear potential candidates and myself," he wrote.
Senator Shoebridge, who became leader in September, has denied any prior knowledge of allegations about his colleague.
"This process must include procedural fairness for all involved, with the key findings made public," his spokesperson said.
The leader does not have a say over what is published, given the investigation is taking place in another jurisdiction.
Thursday's announcement had followed seven Greens members penning a letter to the party leader demanding an investigation into his colleague's behaviour in the presence of women.
Senator Steele-John said the letter's authors had not outlined any allegations in detail but vowed to participate in any investigation into specific incidents.
He claimed it was no coincidence the letter had been written the day after the party had agreed on a timeline for the next preselection.
The senator, who has cerebral palsy, said a nickname "feels on wheels" was originally a slur used by opponents to mock his disability and emotions.
It had been corrupted over time to refer to alleged inappropriate conduct towards women, he said.
He denied any knowledge of an alleged instance of sexual harassment at a 2024 Greens campaign event, saying "I don't know how I could respond, or how anyone would begin to investigate it".
A third matter mentioned in the letter, reportedly referring to serious sexual misconduct, had arisen from an allegedly abusive former relationship, with police having investigated Senator Steele-John and laid no charges.
The WA senator also offered an explanation for a 47-page "secret dossier" that reportedly delivered a playbook for Greens media advisers to downplay concerns about Senator Steele-John that could surface in the news or social media.
The file, first written in 2016 before Senator Steele-John entered parliament, allegedly strategised how to quash media coverage and monitor party members and journalists who raised allegations, which the document had reportedly listed.
But the WA senator said the document's real purpose was to clean up a smear campaign that had been based on "half-heard rumours" of an interpersonal conflict between himself and two women.
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