Ortho Siblings

The Ortho siblings are a pair of Chimera Ant siblings who resided in an underwater lake in the Republic of East Gorteau before being beaten by Killua.

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.

Chimera Ant arc


After Coburn successfully attaches the Bar Double Bull badge conjured by the sister on Killua, the Ortho siblings are revealed and the brother begins the game of darts. By aiming at the dart board inside their base, he can hit Killua using their Fish Darts ability. He was able to strike damages to Killua which resulted to massive blood loss. 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 Killua is dead, the siblings come out of their hiding place to check his body out. After seeing the boy's body, they notified Flutter so that they would be promoted to assistant squadron leaders. After rejoicing, they were taken by surprise and decapitated by Killua. After being beheaded by Killua, they were shocked to see a human to have reflexes fast enough to catch their dart. They then asked if Killua was skilled at playing dart. He then replied that at age six he mastered the game and counted down from 1,440 points. After Killua explained how he was able to decode their attacks, they just blamed each other for losing.

Abilities & Powers
Being Chimera Ants with the genes of fish, the Ortho siblings can breathe underwater and are immune to water pressure to a certain extent. The brother is exceptional at throwing darts.

Trivia

 * Their ability is likely based on Kaname Hagiri, an antagonist on YuYu Hakusho, another manga created by Yoshihiro Togashi. Hagiri was capable of marking his victims with targets and shooting projectiles that would automatically aim for those targets.
 * The dart game they were playing were a 01-501 game. The game starts with 501 points and the goal is to reach zero.