Rum was part of the duo Heartsdales with her older sister Jewels. Although was born in Japan, she grew up in Yonkers, New York from 1982 to 1996. Having spent 14 years in New York, she mastered the English and Japanese languages. Rum was known for rapping and singing in the duo and also doing the more lighter-sounding chorus.
- Real Name: Sugiyama Yumi (杉山ユミ)
- Blood Type: O
- Birthday: December 17, 1981 (Sagittarius)
- Birthplace: Tokyo, Japan
- Height: 164 cm
- Interests: Shopping, Kendo, Basketball, Photography
- Favorite Artists: Eminem, 50 Cent, Lisa "Left Eye" Lopez, Janet Jackson and N.E.R.D.
- Favorite Movie: USUAL SUSPECT