I'm looking for a fantasy novel with a strong focus on adventure and character growth, perhaps involving demons or dungeons.

If you're seeking a fantasy novel that emphasizes adventure and character growth, with elements like demons and dungeons, "Multiverse Gacha" sounds like an excellent fit. The description mentions the protagonist awakening in a treacherous realm, which immediately suggests adventure and challenges. The mention of the "legendary Gate of Babylon" implies a unique power system or ability that will likely be central to the character's development and journey.

This type of novel often involves a protagonist who starts with certain limitations or in a difficult situation and gradually grows in power and understanding as they explore the world and overcome obstacles. The presence of demons and dungeons further points towards action-packed scenarios and opportunities for the protagonist to face formidable foes, learn new skills, and adapt to a dangerous environment. The "gacha" aspect in the title also hints at a system that might involve acquiring new abilities or items, which can be a significant driver of character progression and plot.