Ortho Siblings

The Ortho siblings consist of a brother and a sister Chimera ants who stay in an underwater lake in NGL.

Appearance
They have features of aquatic animals. Both of them have scales covering their legs as well as webbed feet. Scales also cover the older brother's arms while the sister's are left bare.

Plot
After Remora successfully attaches the Bar Double Bull badge conjured by the sister on Killua, the brother starts throwing his fishlike Nen darts at Killua and seriously injures him with ease. However, Killua figures out that the finishing dart is aimed at his head and using his Godspeed technique to greatly increase his reaction speed he stops it when it just touches his skin. Thinking that he was dead, the siblings come out of their hiding place to check out his body but they are taken by surprise and decapitated by Killua.

Trivia

 * Their ability is likely based on Hagiri Kaname, an antagonist on Yu Yu Hakusho another manga created by Yoshihiro Togashi. Hagiri was capable of marking its victims with targets and shoot projectiles that would automatically aim those targets.