Iori is Taichi's classmate, a bright, friendly, popular girl. She's the president of the Cultural Research Club, but rather than lead everyone, she sets the mood and gets them excited. Occasionally she takes bold actions in front of others, be it due to carelessness or simple naivety. She has had five different fathers, and having previously a violent stepfather, she had learned to alter her personality to fit the expectations of others to the point where she is unsure who she was originally supposed to be. She is in love with Taichi, and confesses her feelings in episode 5. However, she decides not to date him due to the phenomena the group is facing and for her safety. (Source: ANN)
Kokoro is the newest librarian at the secluded Kokoro Library.
Kokoro, Aruto and Iina's late mother. She was a nurse at a hospital in a war zone, where she met Jordi. She cared for Akari, a child at the time, and was often found in the library, looking for books to read to her young patient. She is very similar in appearance to her youngest daughter.
Kokoro (ココãƒ) is the main conductor of the Sea Train, Puffing Tom, at the station just outside of Water 7. She has a granddaughter named Chimney, who accompanies her everywhere. Source: http://onepiece.wikia.com/wiki/Kokoro
Kotonoha's younger sister. Unlike her shy older sister, she is very talkative, full of curiosity, and likes to tease Kotonoha around, but she actually worries about Kotonoha a lot. She often wants to play with Makoto during his visits at her house. Her first name means "heart" in Japanese. *Wikipedia
Aoki's first crush in his younger years. It is revealed later in the series that she resembles Kiriyama, as Aoki, during the time phenomenon, accidentally mistakes Kiriyama for Nana Nishino's older sister.