The official Fortnite is mainly focused on battle royale, building, and fun adventures. It has a broad audience including kids and teenagers, so it would never have something like an 'erotic story'.
It can walk around in the Lego world. Just like how normal creatures move in our world, the Lego monster can use its Lego legs to stroll through the Lego streets or fields.
Yes, it probably will be. The visual novel format is very different from the battle royale gameplay of Fortnite. It'll likely focus more on story and character development rather than the fast - paced combat.
I'm not sure if it's an official new Lego set concept yet. However, given Lego's creativity and the vastness of the Star Wars universe, it's not out of the realm of possibility. It could start as a fan - created idea that Lego decides to pick up on. Or it could be part of a marketing campaign to test the waters for a new type of Star Wars Lego set that has a more humorous or unique angle, like the focus on a mustache.
Fortnite Story is indeed free. You can jump right in and start experiencing the story without having to pay upfront. But keep in mind that there could be optional paid elements for customization or to unlock certain extras.
Fortnite's story is set in a post-apocalyptic world where players battle to survive and build. There are various missions and events that shape the narrative.