Here, I'll analyse Ken's signature move: the "Great Whirlwind Kick" of Exceedraft E13. The technique prioritises looking flashy and dramatic over resembling anything done in actual karate fights.

The "Great Whirlwind Kick" starts with Ken leaping into the air and spinning around while kicking to keep his opponent's attacks from landing on him. Like an approaching whirlwind, he knocks down whoever's in his path with a spin kick.

As a martial arts technique, it's impractical for it depletes lots of energy in having the fighter oppose gravity to get off the ground and perform multiple spins without executing attacks that threaten the opponent. Moreover, it telegraphs his final kick, which would in reality allow an opponent to think up a counter in the time taken to perform the move itself. What’s also improbable is that no one has figured out a counter to it in all six karate tournaments that Ken has fought in and won.

After Ken performs the technique, we're promptly shown its effects on the events in E13 which keeps us from thinking too much about its lack of practicality. It also doesn't stretch realism too far in being used as a finisher. After Ken lands his kick, his fight ends regardless of whether it results in a decisive victory or defeat. A fighter actually performing the move would be unable to generate power from the ground, which limits options for follow up attacks and continuing the fight.

Being elevated above the ground is what's most distinctive about the "Great Whirlwind Kick" and also crucial for Ken's characterisation. As Ken ends his fights at a greater height than his opponents, it visually differentiates him from them, illustrating his greater mastery over the fight and the case as a whole.

In our world, what goes up must come down. Ken's mastery over the situation is ultimately fleeting as his success in performing his signature move is closely followed by him being brought low in a figurative or literal way.

The "Great Whirlwind" kick presents Ken as impressive and powerful for setting up the contrast when he appears weak and powerless. The change in emphasis from Ken's strength to his weakness suggests his limitations in influencing the course of events on his own. We then better understand what drives him to seek closeness with others who could reflect his potential back at him and enable him to distinguish his worth with his unique talents.