Kuroda Rumiko (黒田るみこ Kuroda Rumiko?) is Hanasaki Tsubomi and Kurumi Erika's classmate in Heartcatch Pretty Cure!. She later becomes a member of Erika's fashion club. Like the rest of the girls, she likes fashion, but originally not to the point of joining.
Rumiko has slanted, pale brown eyes and long pale brown hair. She wears oval glasses. Her normal attire was depicted to be a pink T-shirt with a denim skirt over short magenta leggings and a pair of ivory-colored boots.
Rumiko, along with her friends Sakuma Toshiko and Sawai Naomi, is present in class when the teacher, Tsurusaki, presents them the new student, Tsubomi. Despite Erika giving Tsubomi a hard time, Rumiko and her friends eat lunch with her and get to know more about where she previously lived.HPC01
Some days later, after hearing a wonderful translation of a poem by Tsubomi, the girls gather around to ask her about it. When Myoudouin Itsuki arrives to inform Erika that if she has not signed in three more members and given the list to the student council by the end of the day, the club will be disbanded. Noticing that Erika looks at Rumiko and the two other girls, they try to pretend like nothing, but in the end they agree to become members after they get a twenty percent discount plus a free notebook from the Kurumi's shop. HPC07 Days later, Rumiko follows the club when they discuss club activities.
When they get to know that Erika is the little sister of the recently famous Kurumi Momoka, they beg her to somehow give them access to look when they are taking photo shots, excusing it as a club activity. When there, they tease Erika for a short while, but they run when they see a Desertrian, made out of Momoka's jealousy of Erika.