Espoir

Espoir is a Super Special Move introduced in KOF Maximum Impact Regulation "A". It returns in The King of Fighters XV as Ash's Climax Super Special Move.

KOF MIRA
Ash summons a big pillar of green flame around himself for a moment, doing heavy hits & damage. Must be performed while the Lv.3 Sans-Culottes is active, and deactivates it after use.

KOF XV
Ash creates an array of arrows made from green flames. If one pierces his opponent, he creates a flaming tornado around them.

KOF XV
Boasting a hitbox big enough to contest most moves at the furthest range, this move can be used as a combo ender, pre-emptive anti-air, or even a panic move if you're bold enough for it and are willing to spend three bars in doing so. Given that Ash is very meter-reliant as an anchor as it is, this is probably your go-to round ender if you want to end the entire match in style.

Dealing with it also comes very easy - simply bait it out and watch as Ash is helplessly caught with his pants down mid-whiff, allowing you to capitalize on this with a touch of death combo of your own. Blocking it up close is also just as good of an idea for you and a horrible time for Ash, since the move is incredibly negative on block.

Trivia

 * Espoir means Hope in French.