Reiko is Kai&#039;s mother. She works as a prostitute.<br /> <br /> In the manga:<br /> She likes the sea a lot, but she has never seen it so she named Kai after the name of &quot;sea.&quot; She was born and raised at the Edge of the Forest, so no wonder she became a prostitute. She hates her work and guys too.<br /> <br /> She gave birth to Kai when she was 15, so in the beginning of the manga she is 25. She looks really young.<br /><br />