Minor role? Challenor stood for Deputy Leader of the Green Party! After the Greens belatedly and halfheartedly tried to investigate whether there had been any safeguarding breaches by allowing David Challenor to act as Aimee's election agent while Aimee knew he was awaiting trial for rape and torture of a minor child, Aimee took great offence and left the party. Incredibly, the LibDems were delighted to welcome Aimee in, but that didn't last very long either, and Aimee went off to the US to marry one of members of Aimee's polycule, a man who has openly spoken about being sexually attracted to minors.
I understand that Aimee was also a moderator on Reddit for a large number of groups attractive to young kids interested in gender and therefore responsible for banning people raising questions and censoring debate. Eventually either Reddit acted (very late, after ignoring many complaints) or Aimee resigned. A lot of damage would have been done before that, though.
David and Aimee Challenor claimed credit for coding one of the first terfblockers on Twitter, leading to thousands of people, mostly women, being automatically blocked, often not even because of anything they'd posted, but just because they followed prominent gender critical accounts.
I can't agree that AC was a minor figure in any of this.