Isaak

Isaak is one of the huskies on the expedition. He and Jack form a close relationship.

Physical description
He is describes as having 'ice-blue eyes' and being as large as a wolf despite being one year old during the expedition.

Dark Matter
Isaak is one of the youngest dogs on the expedition and falls in the harbour while they are in Tromsø. During the expedition, his clumsiness continues as he gets his head stuck in a pemmican tin twice and cuts his ear on the tin while Jack tries to free him.

He is shown to be able to sense the ghost and the unsettling feeling it leaves over Gruhuken several times

Jack
Jack is initially very reluctant to interact with the dogs. Isaak and Jack become friends after Jack frees Isaak from a pemmican tin twice (alternatively after Jack is tricked into feeding Isaak two tins of pemmican).