Little helper at the North Pole

Alter ___ (alternative personality)3 "Here ___ nothing!"4 Brute in fairy tales4 "___ vs. Wild," adventure series starring Bear Grylls3 Word repeated thrice in the title of a 1976 ABBA song that says "It's a rich man's world"5 ___ fuel to the fire3 ___-noir (crime movie genre, maybe)3