Harune Itsuki

Harune Itsuki is Aira's little brother in Aurora Dream. By Dear My Future he becomes a Prism Star himself, forming a unit with Yong Hwa.

Aurora Dream
In Aurora Dream, Itsuki has mostly minor role. He likes to make fun of Aira's clumsiness, but also supports her as Prism Star. He is also a good brother to all his sisters, such as when he explained Aira on why Uru and Eru got upset at her words in AD33.

Dear My Future
In Dear My Future he became a major character. He first appeared in DMF05 as the mysterious guy both Reina and Jae Eun got a crush on. While Jae Eun moved on, Reina had a crush on him through all the series. He didn't realize it at all.