And her jockey, Kylie Williams, is not short of confidence going into the $15,000 open 1200m.
''If she's right . . . she'll win.''
Williams has good reason to be confident with the Neil Coulbeck-trained 7yr-old. The daughter of Traditionally had her first start in a year in the listed Pegasus Stakes on the first day of the New Zealand Cup carnival, and lost no admirers running fourth to Silver Eclipse.
''She hadn't raced for over a year, and with the way she raced the other day, I was very happy with her,'' Williams said.
''She had probably come to the end of it - she was definitely going to run third and then 50m to 100m out I felt her coming to the end of it underneath me. Scapolo just got her on the line, but that was understandable.
Rewa's last race prior to her Riccarton run was at Ashburton in August 2013, with a trial for previous trainer Jan Hay at Ashburton in May her only competitive run prior to Ashburton.
The small field of six and a kind weight of 55kg - just 2kg more than her weight in the Pegasus - all add to the case for Rewa.
Williams said a start in the Hazlett Stakes at Wingatui on Boxing Day was Rewa's next target ''all going well''.
Williams is back on board Ric O'Shea in the open mile, although she knows the small field of five could be tricky.
''It's a competitive little field - the Parsons' two [Locket and My Chino] are in sensational form and Asaint Sheaint will probably need the run, but she goes all right, too.''
Williams has teamed up with Ric O'Shea 13 times before, and expects another honest effort for the son of O'Reilly who finished 11th in the group 2 Coupland's Mile.
''Every time I've ridden him, he's been competitive - he's going to the Timaru Cup after this. He'd want to be winning or going a pretty good race to go on to the Timaru Cup.''
Williams hopes the pace will be true, particularly with Asaint Sheaint a noted leader lining up in a fresh state.
''[Ric O'Shea] is the type of horse who can jump out and you can fall over his neck and let him do his own thing. But he'll probably be in the one-one or three back, one-off.
In small fields, you know what can happen - but I think Asaint Sheaint will make it a truly-run race anyway. I just don't want Chris Johnson [on Locket] on my back waiting for me to pull out and go, and he gets to peel off it.''
Pretty Good Excuse (race 8) bypassed Cromwell after drawing badly, but her luck did not improve for tomorrow either. She will jump from barrier 14 after the balloted runners are removed.
''It's a poor draw again but it's only on the back door step,''''If she gets a nice enough run, she'll be very hard to beat.
Why Wait (race 9) provides Williams with a tidy chance in the last race of the twilight meeting, after a good third behind Coup Rotorua in rating 65 company on the last day of New Zealand Cup week.
''The only thing is he's the type of horse who likes to do his own thing - if he relaxes outside the leader and I don't have to bustle him, he'll go a good race.''
