Thunderclap is a droid sent by Prizma to lure out Sailor Moon and Rini by causing a massive thunderstorm. Her source of power lies in a large drum she carries. When she bangs on her drum she can create rain storms and thunder. Her drum sticks can shoot bolts of lightning and she also uses a blowdryer to blast out powerful gusts of wind. She appeared in Episode 18 of Sailor Moon R.
After being told by Rubeus that Serena's greatest fear is thunder, Prizma summoned Thunderclap to create a thunderstorm that was to last for days. Rini tried to use her time travel key to go back home but it instead caused all the gravity near her to disappear. Thunderclap was drawn to Rini's energy and attacked her but Sailor Moon came to stop her. Thunderclap used her hairdryer to shoot out a burst of wind that blew Sailor Moon into a wall and then shocked her with bolts of lightning. Her drum was broken by Tuxedo Mask, which caused Thunderclap to get shocked herself. He then fired multiple roses at her which missed but distracted her long enough for Sailor Moon to use her scepter and shatter Thunderclap through a window, killing her.
Thunderclap is the first droid whose task is not to take over a crystal point in Tokyo.
- Thunderclap is among the Droids that appear in Sailor Moon: Another Story.