Formidable

While she generally tries to act calm and ladylike like her sisters, she's actually more temperamental and laid back in nature, shown in a special set of lines (a first for AL) post oath that has her being honest with the commander. Fitting for one of the youngest sisters. She also briefly lets it slip if defeated.

She does not take well to being called (or implied to be called) heavy or any other synonym thereof. Her taking weight-related implications badly is a nod to an incident at the actual ship's launch where the things keeping the ship in dock broke and the ship launched itself, incurring a few casualties. While her thrill-seeking nature might be a reference to her role in the Battle of Cape Matapan, where she became the only aircraft carrier ever to participate in a gunnery dual as part of a battle line.

Sibling Yin-Yang: With Illustrious; white against black, demure against temperamental, and their initial plane loadouts are the inverse of each other's.

Her ladylike facade and some of her post oath lines (like asking which of her big sisters you like better) show some sizable hints of successful sibling syndrome going on. Ironically, in gameplay she is agreed on to be the strongest sister of the three.

She admits that maintaining her ladylike persona can be overbearing and that she would rather be doing something fun.

Mentioning anything to her that even remotely has to do with her weight is a one-way ticket to the seafloor.

The combination of her clock/time-theme and her gothic dress makes her look to be a shout out to Kurumi. Also to DIO Brando after the particular scene and her skill.