The Wind Reaper.
That was the name the Uno-Eye Assassin Guild gave to Axel, who tried to kill Fruity three times but ultimately became his sworn brother.
Back then, Fruity had just finished destroying the Ice Nation, but it seemed some people never accepted their loss, so they hired one of the most dangerous assassin guilds to handle him.
The Wind Reaper was the one sent after him.
Klaus had to give it to them; they, indeed, were worthy of being called an assassin guild, for they had carried out some famous assassinations that left galaxies shaken to the core.
But now, sitting under a pavilion with his expression calm but deep in thought, is Mason, Axel's incarnation in this life.
"My dad once said a young man who does a lot of thinking will remain single forever," Klaus said, snapping out Mason, who hadn't even realized someone had appeared beside him of his daze.