Cecily's personality can be described as kind and caring. Though a good person she was initially somewhat easy to manipulate, as evidenced when her grandfather convinced her to become the figurehead of Cosmo Babylonia despite the fact she disagreed with the ideals of the nation. Eventually she develops the strength to stride out on her own and do what she desires. During her tenure as leader of the Crossbone Vanguard she made it a rule that her pilots were to avoid taking the lives of Jupiter Empire pilots who were to be captured and sent back.

Originally Cecily's skills were oriented to life as a civilian. She was a model student who many considered to be refined and beautiful. Because she lived her childhood as the daughter of a baker, and she retires as the wife and owner of a bakery it can be assumed she knows how to bake. When she was brought into the Ronah family she was taught the political skills needed of an aristocratic ruler and the military skills needed to pilot a mobile suit.