Yeti Cool Brothers

The Yeti Cool Brothers, Rock (ロック) and Scotch (スコッチ) are assassins hired by Caesar Clown.

Appearance
From what is seen in their silhouette, they have long, furry legs and also have fur on their upper body. They wear dark shorts and hats, which are frozen from the top.

They are massive in size, as one of their footprints is larger than Brook, who stands at 266cm (8'8½").

Personality
They are quite merciless, as they quickly eliminated Brownbeard, Zoro, Sanji, and Brook. They are also quite loyal to Caesar Clown, as they follow his orders without question. They are also quite elusive, as Brownbeard said that no one knows what they look like and they never show themselves. They will willingly kill anyone they are asked so long as they are paid.

Abilities and Powers
They each carry a rifle which seem to be their primary way of fighting. Caesar thought it was a bit much to send them to deal with the Straw Hat Pirates, so their strength is presumably quite high. They are, despite their tremendous stature, fast enough to instantly disappear from Luffy's sight. They even managed to defeat Zoro, Brook and Sanji (in Nami's body) seemingly effortlessly.

Punk Hazard Arc
The two Yeti Cool Brothers were summoned by Caesar Clown to deal with the Straw Hat Pirates, and they were first seen outside one of the abandoned labs that the crew was residing in. They appear to have passed by Zoro's group as Zoro, Sanji, and Brook are unconscious around their giant footprints. Whether or not that is due to a confrontation with them is uncertain. During a conversation with one of Caesar Clown's troops, they inform them that they killed Sanji (in Nami's body), Brook and Zoro and tell them to come and pick up the bodies before heading off to where the kids are. Luffy discovers them and turns back, but not before the brothers attack Brownbeard and capture Nami (in Franky's body).

Trivia

 * The Yeti, or Abominable Snowman, is a legendary ape-like beast said to inhabit the Himalayan region of Nepal and Tibet.
 * Scotch has the same name as one of Kaido's subordinates, Scotch.
 * Both of their names have a reference to alcoholic drinks: Scotch whisky is often referred to simply as "Scotch", and mixed drinks that call for ice can be described as "on the rocks".