Upasocon was the final Daimon Heart Snatcher sent by Mimet to extract Pure Hearts. She was created from a computer. She attacks by shooting projectiles. She appeared in Sailor Moon S Episode 31, Next in Line.
Mimet stole Telulu's job and took Upasocon to the Mugen School to extract a physicist's Pure Heart. However, she was stopped by the Sailor Scouts. Tuxedo Mask and Sailor Mini Moon arrived as Upasocon and Mimet gained the advantage, and Sailor Mini Moon used Pink Sugar Heart Attack on her. Sailor Moon transformed into Super Sailor Moon and used Rainbow Moon Heart Ache to destroy Upasocon.