Ono Haruka (小野はるか), known by her nickname Harushan (はるしゃん) during her time in TNX, is a former member of NICE GIRL Project! as a NICE GIRL Project! Kenshuusei. On September 19, 2011, she was officially unveiled as a new NICE GIRL Project! Kenshuusei during Trainees Collection vol.2 at Shibuya Yaneura. She was designated as a senbatsu member and appeared at various events as a representative of NICE GIRL Project! Kenshuusei starting in August 2012. On April 6, 2014, she announced her graduation from NICE GIRL Project! Kenshuusei, and officially graduated during Trainees Collection vol.9 on April 29, 2014 at Shibuya Glad alongside Makochi and Haruru. She was also a former first generation AKIHABARA Backstage pass idol cast member.
On December 25, 2015, she was announced as a member of a new idol group Yumeoi Shoujo under the stage name Sano Ruka (佐野るか), and shortly after announced as the leader. She graduated from the group on April 6, 2019.