Brothers Martens

Brothers Martens (russian: Братья Харзы "Bratya Kharzi") — a not very big pack of the yellow-throated martens, which are the main antagonists of the cartoon in the most cases. Two of them, using the Owl, went in pursuit of the Monkey Treasure in the second season.

Voiced by Benedict Cumberbatch, in original (russian) by Diomid Vinogradov.

Looks
They all are dark-brown, with the yellow throat and chest, but every have the individual pattern. Their muzzles are white. Also, they have a black wall of hair and so their eyes (especially leader's one) are almost invisible.

Temperament
They all are equally meany and greedy and always want to get something, that belongs to the Leo, Tig and their friends by any costs. Yet, they are big cowards and run away at the first chance they get. Still, despite all this, they can be positive characters.

Official description

 * Brothers Martens are the four tomboy martens. They hunch together and always looking for their own benefit. They like to chuckling at the friends and to pull them into the tournaments and races and win the unfair way. Their leader's name is Spike. Others Martenses is his henchmen, who unquestioningly obeying his orders. 

«The Skin of the Sun » (1st episode)
In this episode Martenses want to get the Skin of the Sun.

«The Silver River» (5th episode)
Martenses, who were eavesdropped the Mapa Pandiga's talking with Mila, Tig and Yara, found out, that Leo wants the Silver River from his dream, but his friends had already made "the greatest gift in the life" and didn't said what is it. Yet, Spike wanted to get this gift by any cost. He told his plan to the others Martenses: the plan involve of the taking away this gift from the leopard by luring him to the Black Rock – the scariest place in the all Taiga.

Then, they found the sad Leo and lied that they know, where is the Silver River. Delighted Leo asked them naively to lead him there. And Martenses, following the plan, led him to the Black Rock.

«The Red Deer » (6th episode)
Here, they appear as neutral background characters and don't participate in the events of the episode.

«The Most Precious Thing» (7th episode)
Here, they are also neutral.

«An Old Friend» (10th episode)
Here, Leo and Tig found the nest, and started to ride the snow slide on it. Of course, Martenses saw it and, when Leo and Tig went away, take it. But this nest was belong to the stork Mr. Theodor, which at this time was flying from "the far lands". The friends met Theodor. But... when he flew to the place, where his nest should've been, he saw that nest is gone. Leo and Tig started to sought it, and didn't found. But then, they saw the Martenses, who was riding the nest.

The friends said that they "gave them back their nest". Martenses, certainly, rode away and broke the nest.

When Leo and Tig understood, what was happened, they called Pandiga, Theodor and the other friends, and was very ashamed, unlike Martenses, which weren't even a little. But they were still very guilty. And, to make amends, they and the friends build a new nest and Theodor was very glad.

Facts

 * One of the Martens' name (their leader's one) is Spike.