Haruhi Inohara 井ノ原春陽

She just transferred to Junna's school (Sakurahama Private School). A childhood friend of Junna, who calls Junna her "Onii-chan". She's quite attached to Junna. She is actually Junna's sister in the original world but became a childhood friend in the created world. She was also not supposed to exist in the created world but came to search for Junna, who had disappeared suddenly in the original world.