It centers around Gunhild Gretadottir, a tour guide who finds out that she is a Realmwalker — a human gifted with the ability to journey between the nine worlds of Norse mythology. There are 10 main arcs to Realmwalker:
- Chronicles of Asgard
- Saga of Frost
- Curse of Forgiveness
- Island of Mist
- Secret of the Caribbean
- Monsters of Shanghai
- Tomb of the Pharaoh
- Battle for Olympus
- Cycle of Ragnarok
- Age of Baldrheim
Not to be confused with that other realmwalker.
Realmwalker contains examples of:
- All Myths Are True: The central theme of the comic. Focuses on Norse mythology and British folklore stories being real.
- Bigger on the Inside: Mimir's well. It's an enormous void on the inside, and a tiny wishing well on the inside.
- Fur and Loathing: Luideag wears a baby seal fur stole, that's actually a baby selkie's pelt, and she's certainly evil.
- A God Am I: Baldr from Curse of Forgiveness onwards. He brainwashes people into loving him, and plots to take over the nine worlds, believing that he is entitled to do so.
- Massive Numbered Siblings: The 9 Wave sisters. They all appear to be the same age, too.
- Red Oni, Blue Oni: Gunhild and Sigrun are sisters; with Gunhild being a bookish, sarcastic introvert who prefers dark colours, and Sigrun being a bubbly extrovert who prefers pastel colours, especially pink.
- Stage Mom: Lorelei forced Sigrun into child beauty pageants when she was little.
- Surfer Dude: Frey. Everything he says involves the words "totally", "dude" or "like" in some way. His shaggy hair and laid-back personality only add to this.
- Talking Animal: Surge can talk. They are a magical Vatnavaettir water horse, however...
- Viking Funeral: Luke's in chapter 5. He's put in a burning ship and sailed out to sea.