Himawari Hinata

The female lead of the story. She was rescued by a ninja with an odd mark on his neck. Ever since then, she had sworn to become a ninja. As the story begins, she had been restrained and flown on a military jet before being rescued. She's also recognized as a girl who had been sent by her grandmother to the ninja training school.

She meets Marikoji Hayato, the male lead, after a foul-up of her training (hanggliding on a kite) caused her to crash and hang from the gate pole. From then on she calls him "Hayato-dono" (Master Hayato). Her one and only dream is to become a great "Kunoichi" (female ninja) despite her classmates finding her annoying and unskilled.

Source: Wikipedia