A spin kick derives much of its power through rotational momentum, similar to smashing someone with a swinging length of chain.
Now imagine Goji-chan doing that with her tail.
This girl's learning quick!
It's not just that, Goji-chan is being trained on how to manipulate her density and mass at will, functionally making momentum and Newton's First Law of Motion her bitch.
She started that spin weighing maybe 50 kilograms, but she's going to finish it at 50 kiloTONS.
Ideally, you only use it when you need it, and only as much as you need it.In my case, I'm useless on land.After all, your agility is greatly impeded, right?One cannot keep exerting their full Force of Will at all times.