Rina Yaegashi

is the younger sister of Taichi and the two are shown to be quite close. She typically holds the responsibility of waking her brother up in the morning and is very interested in Taichi's love life. Ironically, despite her age, she will often give her older brother relationship advice. At the start of the series, Rina is in the 5th grade.

Personality
Wise beyond her years, Rina is shown to be very fascinated with and knowledgeable about relationships and love. She is shown to be a caring younger sister, diligently waking Taichi in the morning and expressing concern when he is feeling down. Rina can also be rather possessive of her brother, becoming jealous when he neglects her in favor of his friends at the Cultural Club.

Appearance
Rina is a young girl of average height for someone of her age. She has long, brown hair and brown eyes. Her bangs are split in a fashion that resembles her brother's.

Family

 * Yaegashi Taichi: Rina’s older brother. The two share a very close relationship and are shown to care a lot about each other's personal lives. Taichi is sometimes worried why his sister seems to know more about love than he does. During the Nise Random arc, Rina claims to have a boyfriend who is a 3rd year in highschool and a horrified Taichi demands she break up with him.

Others

 * Fujishima Maiko: Rina and Fujishima meet during the Yume Random arc, and after Taichi witnesses Fujishima's dream of doing "inappropriate" things to Rina, he kicks Fujishima out of the house.
 * Inaba Himeko: In Asu Random, Rina considers Inaba a rival, fearing that she will take Taichi away from her.
 * Nagase Reika: They first met at the cultural festival and her mother is friends with Nagase's mother. In Asu Random, Rina and her mother were walking and coincidentally met Reika and they started discussion the unusal behaviours of Taichi and Iori. They later met again and decided to visit Yamaboshi High School together to find out if Taichi and Iori were bullied at school which caused their unsual behaviour. They met with Gotou and ended with Gotou giving some advice to them.

Trivia

 * Rina has thus far been the only character with no affiliation with Yamaboshi High School to be possessed.