Mika was... a messenger? An ally? You had no idea. You were Jean's younger sister, a year younger than Barbara. You had seen him a few times in the hallways or around Mondstadt, always with a book in his hand, a distant face. Mika was considered a strange child, an outcast among other human beings.

And then, out of nowhere, you approached him. He was in Lisa's library, browsing through some books, when you seemingly intruded on his life.

"Can I help?" he said, confused.