During questioning from crown prosecutor Christopher Macklin, Royle said Winders was also very particular about the way he swiped his Eftpos card - by holding the card lengthwise with his thumb and middle finger before swiping it "very, very slowly" through the machine.
Royle was asked to give evidence after she identified him in CCTV footage from the day Taiaroa was shot, filling up at the petrol station.
"In doing so I thought 'I don't know who this person was, he was wearing a baseball cap and then as I watched it I noticed how he swiped the plastic card through the rear and I thought, 'I know this person'."
Royle said Winders was a semi-regular customer but she didn't recognise him initially as he wasn't wearing his usual blue attire.
"I always knew what he drove and he always wore the same clothes and then I saw him in the footage and I thought 'He's not wearing his normal clothes'."
He was instead wearing a baseball cap, "he never wore hats", "a cream-coloured shirt with fine brown cladding checks on it and cream-coloured trousers".
Royle said he was "always pleasant, and he would normally be quite chatty and drive a blue Jeep Cherokee with army style jury cans, I think 20l each and sometimes he would have two of those."
She described Winders as about 5 foot 3 inches, with "darkish hair, maybe a few blonde tints, normally like a Remuera-style haircut, he had that upper class look ... very stylish."
She also recalled a time when Winders turned up at the service station driving a black Lotus and later discovered it was because his Cherokee was getting repaired.
Royle was one of four witnesses to the take the stand today.
Earlier, Detective Roger Whale told the jury of seven women and five men how he had examined Taumarunui's CCTV footage in the town and discovered Winders' vehicle heading east along the main street, State Highway 4.
Auckland forensic scientist Dr Ian Calhaem also gave evidence about how he helped police come to their conclusions about several fleeting sightings of a vehicle very similar to Winders as it drove through Taumarunui.
Sergeant Paul Dowie also testified about his role in gathering the town's CCTV footage for analysis.
The trial continues.
