From her wide gate, Lightning Dream went back to settle towards the rear of the field for Kennedy before being asked to improve from the 2 f and was presented wide at the turn where she continued to improve and ran out an eventual three-quarter length victor.
"From the gate she really struggled early, so I left her alone and let her find her feet," Kennedy said.
"She relaxed beautifully and finished strongly, and I think she'll definitely get over more ground."
Trainers Mark Walker and Sam Bergerson were pleased with the victory and were full of praise for Kennedy's ride.
"It was a good ride of Warren's to get her into the action from that far back," Walker said.
"She's made a really promising start to her racing career, been consistent before winning at her fourth start, and I think she'll only improve with more maturity and strengthening as a four-year-old.
"She has the potential to make into a nice staying handicapper as a four and five-year-old mare.
"It was good to get the maiden win under her belt in the first campaign, and we'll set her aside for a good spell now."