Sophie is a girl Asbel meets as a kid, found sleeping in a flower field atop Lhant Hill alongside young Hubert. She's got complete amnesia—no memories, no past, nothing. Asbel names her after the Closophie flower she was drawn to when they first met.
At first, Sophie's basically a blank slate. She lacks common sense (nearly walks off a cliff chasing a butterfly), struggles with basic communication, and doesn't really grasp emotions. But as the story unfolds, she bonds deeply with the group, driven by a protective instinct she picks up from Asbel. She becomes genuinely devoted to the people around her.
That said, Sophie can be a lot. She takes things literally and gets confused by anything complicated the party discusses. She's endlessly curious about the world in that innocent, sometimes annoying way—constantly asking questions about trivial stuff. It's charming more often than not, though fans often note it plays into her character arc about learning to understand people and emotions rather than just facts.
Content compiled by AnimeList.moe from publicly available sources.