With regular skipper Jess Jonassen away on Australian playing duties in New Zealand along with Beth Mooney, Georgia Redmayne will take over both roles for the matches against the Breakers on Friday and Sunday.
It will be the first time Redmayne will have led the Fire, with the top order bat and keeper currently the leading WNCL runs-scorer for the team with 298 runs at 74.50 so far this season.
Also named in the squad is Ipswich/Logan teenager Ruth Johnston who would make her WNCL debut if chosen in the starting side.
Johnston, who joins her cousin Ellie in the Fire squad, was the leading runs-scorer for the Hornets, with the Dalby and Toowoomba product finishing with 865 runs at 43.25 in all formats in the Katherine Raymont Shield competition.
A hard-hitting top order bat who also bowls off-spin, Johnston was a Queensland Under-18 representative last year.

She was the 2017-18 recipient of the Jodie Fields Young Cricketer Development Scholarship, awarded annually by the former Queensland and Australian captain to young female cricketers to develop their playing careers and further their education.
Queensland currently sit in fourth spot on the WNCL ladder just behind NSW, and three points behind second-placed Tasmania.
The Fire will meet the Breakers at North Sydney Oval for their games on Friday and Sunday, knowing that wins and bonus points will ultimately determine which team will take on the unbeaten Victoria in the Final.

NSW will be led by former Queensland Fire allrounder Sammy-Jo Johnson who will also make her captaincy debut on Friday.

The Breakers have made the WNCL Finals for the past 24 seasons.
Queensland Fire v NSW Breakers
Fri, Sun, North Sydney Oval
Meagan Dixon
Holly Ferling
Grace Harris
Mikayla Hinkley
Ellie Johnston
Ruth Johnston
Laura Kimmince (v-c)
Charli Knott
Lilly Mills
Georgia Prestwidge
Georgia Redmayne (c)
Courtney Sippel
Georgia Voll
(one to be omitted, 12th player to be named).

The matches will be streamed live on cricket.com.au, with Sunday’s game also set to be available on Kayo.