Your character is your name backwards! Miss Storer's character would be called Rerots Ssim! Miss Finnie would be Einnif Ssim.
Once you have got your character's name, write about all the crazy things they might get up to in backwards land.
Maybe they wear gloves on their feet and socks on their hands, they drink fish and chips and eat water and their pet cat barks!
Make us laugh with your crazy ideas.