Jack is a jolly giraffe when other animals are around but when he is on his own he is a jolly jaguar. This is inexplicable and at the same time, he is very affable.
He can use a supersonic roar and can camouflage. He loves Bertie and the bumbling bees and their honey and he hates the Lord of Nulth. He loves swimming in the pink lake and he hates Conor the King Croc.
He also likes helping to defend the night zoo whenever the voids attack. He is the only one of his kind after Nulth destroyed his village.