|Movie||Urusei Yatsura 3:Remember My Love|
Ruu (ルウ) is a young boy that appears in the third movie of the Urusei Yatsura series, Remember My Love. It was revealed Ruu is Lum's descendant. It is implied that Ruu is Ataru's son.
- Ruu makes a cameo in the ending credits of Urusei Yatsura 4: Lum the Forever