She is an ex-model with a loveheart tattoo on her bottom and describes herself as a "party animal" who is "completely out of control".
Lisa Jeynes: Is she the viewers' cup of tea?
And she arrived with enough booze, pizza and chocolate to leave a table groaning - and she sleepwalks.
Is it any wonder the media claims Lisa Jeynes has been brought in to liven up the fourth series of Channel 4's Big Brother reality show which has been accused of lacking passion?
It is an impressive start for someone who has arrived seven weeks into the 64-day show - but still has an equal chance of walking away with its £70,000 first prize.
It will be a few days yet before Lisa can nominate any of her six fellow housemates for eviction or before the public can vote on her removal.
Boyfriend: Marcus is not worried if Lisa flirts
By then, the Big Brother housemates might know more about the tanned, blonde 35-year-old who has appeared in their reward room.
If they were in touch with the outside world, they would already know that Lisa, from Penarth, near Cardiff, is a Wales rugby fan whose last job was as the manager of a retail clothes store.
She has also been a beauty consultant, a make-up artist in Howells department store in Cardiff and a part-time events co-ordinator.
Lisa loves Robert de Niro and the television series EastEnders and Sex in the City - her family are recording both series for her while she is locked away in the reality show's battle for the prize money.
But if Lisa has any say in the matter, she may well appear on EastEnders herself one day because her dream job is to be a soap star actress.
She hopes having completed an Open University social sciences course will help her break in to acting and says when people meet her they are surprised that she is not an archetypal "dumb blonde".
Scott Turner, 27, marketing co-ordinator from Liverpool
(6-4 to win - above)
Ray Shah, 25, IT systems administrator from London
Cameron Stout, 32, fish trader from Orkney Islands
Nush Nowak, 23, student from Malvern, Worcestershire
Gos Gosal, 31, head chef from Southall, London
Steph Coldicutt, 28, visual merchandiser from Birmingham
Odds of 6-1 are being offered on an unnamed contestant winning
Observers of the show are predicting that her good looks and outgoing personality will soon see her flirting with the four men in the house.
As every marketing expert knows, sex sells and the producers must hope that Lisa's looks and lively nature will help boost viewer voting for the show.
Last Friday it pulled in barely 675,000 votes compared to 1.75 million the week before and one million at this point in the last series.
She has already revealed that she has a tendency to sleep walk and once woke up to find herself on the kerb.
But Lisa flirting with other men is not a problem for her boyfriend of six months, Marcus.
He and Lisa's mother, Sheila, appeared on the accompanying television programme, Big Brother's Little Brother, to reveal a few more details.
In it to win it: Lisa Jeynes
Marcus, who said it was love at first sight when he and Lisa met, said he is not worried about her chatting to the male housemates.
He said: "We have spoken about his and it's all a big game to have a bit of flirting going on.
"She's in it to win it," he said.
One more thing the other housemates may not know is that Lisa packed 13 bras and 23 pairs of knickers for her trip to the Big Brother house.
And if anyone is still wondering, her tattoo is on the right cheek.