|Event||Prelim Rank||Final Rank|
|1st Anniversary Election||Unranked||Unranked|
|2nd Anniversary Election||Unranked||Unranked|
|3rd Anniversary Election||Unranked||Unranked|
|Voice Idol Audition||Unranked||Unranked|
|4th Anniversary Election||Unranked||Unranked|
|5th Anniversary Election||Unranked||Unranked|
|6th Anniversary Election||?||?|
In the tie in Cinderella Girls Theater skits, Koharu is shown to be a sweet girl who owns an iguana named Hyou-kun. She wishes to be a princess, and seems to be good at giving compliments. Koharu likes Twister, and hopes to play with the Producer someday. She is the fifth idol to join the “Little Marching Band Girls” unit, and uses a set of hand bells. During her talk battle, she tells about the boys in her class swinging sculpting knives around dangerously. She does homework with Arisu Tachibana and Mary Cochran.
"I'm Koharu~. Are you going to produce mee...? If Koharu wants to be beloved by everyone, so she must become a cute, princess-like idol, I think! Then, I'm counting on you~ ♪"
Koharu's basic card is Rare. She later received six more Rare card sets and four S Rare card sets with the titles "Plush Princess", "Dream☆Princess", "Fancy Cheer", and "Princess Co-Star".