Millidiana Claes

 is the wife of Luigi Claes and the mother of Katarina Claes and Keith Claes who is comically shown to be constantly scolding Katarina when she acted out of her role as a noble.

Appearance
Like Katarina Claes, Millidiana has hip-length brown hair except she has her hair strand hanging on the left side and light blue eyes.

History
Duchess Claes, also known as Miri Diana, was married to Duke Luigi Claes which was not a marriage of love though not uncommon among the nobility. Miri Diana is the second daughter of Duke Adeth, a family of equal standing to the Claes family, with tight, upturned eyes that caused her to be a little shy, their marriage was something that was decided for them. As Duke Adeth asked Luigi Claes to take care of Miri Diana, Luigi was obligated to marry her when Duke Adeth passed away.

It was as if the couple was both wearing masks, although not to the point where they hated each other, but Katarina felt as if they were unfriendly. That’s why, when looking at the young Keith and his eyes that were so similar to Luigi, it was whispered that Keith was the child of one of the Luigi's mistresses. Miri thought that Keith was her husband's illegitimate child due to that and she almost divorced her husband.

Luigi Claes
Husband

Katarina Claes
Daughter

Keith Claes
Stepson