Yumiko Kobayashi(小林 由美子Kobayashi Yumiko, born June 18, 1979) is a female seiyū who was born in Yōkaichiba, Chiba Prefecture. She is currently a freelance seiyū but until August 2007 was affiliated with Arts Vision. She and fellow Excel Saga seiyū Mikako Takahashi are known as the duo "The Excel Girls". She is also part of the seiyū quartet "Prits" along with Natsuko Kuwatani, Nana Mizuki, and Hisayo Mochizuki; all four voiced characters in Sister Princess.