|Parents||Joseph Corcoran ("father")|
|Relatives||Blossom, Bubbles ("sisters")|
Primary Writer: Foxboy
Buttercup is one of the three AIs aboard the Pinafore. She is modeled after the character of the same name from the Gilbert and Sullivan operetta H.M.S. Pinafore.
Buttercup only accepts commands if they are given in rhyme.