Characters in Hotel Valhalla guide to the Norse worlds

Helgi

Hotel Valhalla's manager for over a millennium; commissions the guide because he is tired of answering new arrivals' questions.

Hunding

The hotel bellhop, serving since the year 749, who writes much of the guide and introduces the gods and creatures.

Magnus Chase

Protagonist of the trilogy the guide accompanies; the book is titled For Magnus Chase, though he does not narrate the entries.

Also in The Sword of Summer, The Hammer of Thor, The Ship of the Dead, 9 From the Nine Worlds