They are the married couple behind Pauline Hanson's Western Australian operation.

Ron McLean, 86, and Marye Louise Daniels, 79, have been put in charge of screening and shortlisting One Nation's candidates for the state election.

Their association with Senator Hanson goes back almost 20 years, and they were thrilled when she phoned in October asking for their help again.

"When she rang us up to say she was giving it to us we were really very proud, and we asked her what changed her mind, and she said 'Marye and Ron, you're the only people we can trust in WA','" Ms Daniels said.

"I do love her. I love her very much."

Mr McLean and Ms Daniels have reprised their former roles as president and secretary of the WA Branch of One Nation in readiness for the March election.

Pauline Hanson has known Mr McLean and Ms Daniels for almost two decades. ( AAP: Mick Tsikas )

Their job is to shortlist candidates and present options to Senator Hanson, who will have the final say when she visits in January.

The party's success at this year's federal election has meant they have been inundated with applications.

They are now going through them one by one from their home in Kewdale, where Senator Hanson has stayed 11 times over the years.

In the past week, they claim to have been approached by three would-be defectors.

"I have got the names of people from the National Party, the Labor Party, the Liberal Party ... [who] have all approached us that they want to stand for us," Ms Daniels said.

They claim the person who approached them from the Liberal Party was not happy with his position on the Upper House ticket, and wanted Senator Hanson's One Nation to put him first.

Couple seeking 'more loyal' candidates

One Nation has a chequered history of choosing candidates in WA.

Three members were elected to the Legislative Council in 2001, but they all turned independent before their terms finished after years of infighting.

The party's only other elected member in WA, Rodney Culleton, is weighing up his future in the Senate after falling out with Senator Hanson.

Mr McLean and Ms Daniels said they had misgivings about Senator Culleton and wished they had said something sooner.

They are hoping a more rigorous screening process will result in MPs who are "trustworthy" and "more loyal to Pauline" than previous members.

And despite riding the party's highs and lows over two decades, the pair's devotion to Senator Hanson has never wavered.

"She's never changed. She's always been there for the people of Australia and she's always said more or less the same thing all along," Mr McLean said.

"She's such a good girl. I can't think of anyone over the last 20 years who's been so devoted to this country," said Ms Daniels.

The party is still awaiting formal registration by the WA Electoral Commission after signing up the necessary 500 members.

But Mr McLean and Ms Daniels say this election will be their last.

They say that when their work is done, they want to hand the party over to a younger generation that's more savvy with Facebook.