Sailor Moon Crystal Episode 16 English Dubbed Episode Title:Abduction -Sailor Mercury-.Episode Description:Usagi thinks Chibiusa knows who captured Rei, while Mamoru tries to get to know Chibiusa better. Chibiusa wants Usagi to rescue her mother. The next of the Spectre Sisters, Berthier, challenges Ami to a chess match, demanding from Ami to give up Chibiusa should she win. Ami wins the match; however, she is caught in Berthier's water sphere. Usagi destroys Berthier, but Rubeus captures Ami and takes her away.