Ruby is a blonde-haired young woman who dresses like a pirate. She appears nearly identical to the character she was based upon, Ruby Heart, though her design features several minor differences. Ruby's coat is much shorter in length than Ruby Heart's, and is unbuttoned, showing that she wears a red corset. Additionally, she does not have an eyepatch, nor do her sleeves have the large white collars like Ruby Heart's outfit features.
Ruby is based directly off of Ruby Heart from Marvel vs. Capcom 2: New Age of Heroes, much like her siblings were based off of several characters from the Pirate Ship Higemaru series. In September 2016, Ruby was added to the Shadaloo C.R.I. character guide. According to the game's director, Takayuki Nakayama, she is not intended to be Ruby Heart, but a different character similar to her.
Ruby is the youngest child in a family of fishermen which include her older brothers Momotaru, Bows. and Beard. A strong-willed lady, she is the most stable and firm person in the entire family. She always makes clear what she wants and always enjoyed her father's travels tales when he was a pirate. While working at her mother's bar she started constructing her own ship to sail the seas. Her ship's name is the Partenaire (パルトネール Parutonēru?, French for "partner").