Suggested by Destroyer Thumbelina is a character who can turn small and you can see how that might not be very helpful in this scenario right? I suppose Thumbelina can try to dodge Jirass’ strikes just by virtue of being so small. Perhaps that will give her the edge in a way. All I’m saying is that it’s definitely a possibility but even then only for a little wile. Without any way to actually injure Jirass this is ultimately a futile endeavor. You can’t win on defense alone. Eventually you need to strike. Jirass wins.