Kollorak

Kollorak is believed to be a representitive of the Visorak horde that lets Sidorak know what's going on.

Arrival of the Toa Metru
Kollorak was the one that originally told Sidorak about the capture of the Toa Metru. Sidorak told Kollorak to drop the Toa when he was stopped by Roodaka.

Final battle of the Colisseum
It is believed that Kollorak participated in the battle of the colisseum. As of the matorans' return to Metru Nui, Kollorak's current whereabouts are unknown.

Personality
Since he's a visorak, Kollorak's personality isn't distinct.

Weapons and Powers
Kollorak is a Visorak Keelerak, therefore he is armed with venom pincers, acidic Rhotuka Spinners, and razor sharp foot tips.