The 1.3million guineas filly won twice as a juvenile and stayed on for third place behind stablemate Dazzling in a Listed race at Navan on her return.
“She ran well in Navan and won’t mind going round a bend,” O’Brien told At The Races.
“She is lazy, which is why she wears blinkers. It’s just to keep her occupied as she doesn’t do a lot – she was like that last year.
“She’s in good form, she stays and she’ll get the trip well.
“Chester is a good, sharp track and it’s not too hard on the horses.”
Carlo Bugatti and Orchestra are the two chosen ones from the Ballydoyle stable in the MBNA Chester Vase tomorrow.
O’Brien has declared blinkers for Carlo Bugatti, the mount of Joseph O’Brien and fourth to the promising Fascinating Rock in the Ballysax Stakes on his return.
Ryan Moore will ride Orchestra, second to Free Eagle on his debut and an easy maiden winner next time out.
Mark Johnston runs Stars Over The Sea, a close third in the Classic Trial at Epsom.
Seagull Star, Romsdal and Scotland add further spice, while Automated, Belfilo and Festival Theatre make up the nine-runner field for the Derby trial over a mile and a half.
Meanwhile, O’Brien can choose from Adelaide, Geoffrey Chaucer and Giovanni Boldini in the French 2000 Guineas at Longchamp on Sunday.
Richard Hannon’s Shifting Power intriguingly still holds an entry after he finished fourth behind stablemate Night Of Thunder in the 2000 Guineas at Newmarket on Saturday.
Powerful owners Qatar Racing could give End Of Line (Andrew Balding), God Willing (Ed Dunlop) and Lat Hawill (Marco Botti) the chance to shine in the Poule d’Essai des Poulains.
Karakontie is one of the leading challengers from the home team, with Galiway a worthy ally for Andre Fabre, who could also run Decathlete.
The well-regarded Kiram and Salai remain in the hunt for Jean Claude-Rouget, with Charm Spirit, fifth in the Guineas at Newmarket at the weekend, among the 20 contenders at this stage.
Aidan O’Brien is typically well represented, with Wonderfully and Palace among 23 contenders for Sunday’s French 1000 Guineas, at Longchamp. Paul Deegan’s Avenue Gabriel is another Irish-trained possible.