Urusei Yatsura S01 E35 Girls' Day! Introducing Ran-chan

"Grab her horns and she might just become your darling!"

First appearance of Ran, Lum's childhood friend. During a small celebration at the Moroboshi house, a little doll enchants Ataru to follow it to Ran. Ran tries to kiss Ataru to drain his youth, but Lum shows up.