Robinetta Ashley

Robinetta is the rich ojousama who is the mistress of the Ashley household (now that her mother is dead) so she knows all about proper behaviour and etiquette, and is very good at fencing too. She’s pretty tsun towards Matthew, especially at the beginning. She prefers to be called Robi.

Spoiler

It is revealed later in the story that she is actually an illegitimate child of Matthew's father, Dusti Hamilton, making her Matthew's younger half-sister.