Natsuki Takayama

Older sister of Itsuki Takayama and Karin's mother.

Trivia

 * The name Natsuki means "summer" (夏) (natsu) and "season" (季) (ki).
 * Natsuki's surname Takayama means "tall, high" (高) (taka) and "mountain, hill" (山) (yama).