Experiment LORA for the Bakuage Sentai, Boonboomger. In theory, you should be able to make all the main 5 Rangers with this.
General prompt: boonboomger, bodysuit, helmet
For a specific ranger, use "bunred" "bunblue" "bunpink" "bunblack" or "bunorange" + "respective color bodysuit, respective color helmet" (As in "red bodysuit, red helmet" or "pink bodysuit, pink helmet")