Kukri be one weapon I picture for her. Handy for fighting, chopping timbrr, cutting cans, and preparing chow. Fitting this sassy feminist who is zero afraid to get dirty.
In my headcannon, Rainbow uses a kukri. Obviously to fight; occasionally using it in her left hoof alongside a dao sword which is in her right one. She also uses a kukri for chopping wood, foliage, food, and cans. Fits her.