As an experienced gambler, Celestia appears collected, cold and cunning by nature. She possesses the ability to manipulate others to do her bidding and can lie with a straight face, this is shown when she is able to manipulate Hifumi to make her royal milk tea and further be her accomplice during Chapter 3. She is shown to be fairly intelligent, referencing several aspects of game theory such as Prisoner's Dilemma or Zero Sum Game and her manipulative and coercion skills are shown in Chapter 3, being able to deceive the majority of the students, including Byakuya up until the class trial. Her intelligence is also shown in previous cases in which she, alongside Kyoko, Byakuya, and Makoto are the ones to bring up crucial points and is also capable of keeping up with Byakuya and Kyoko's train of thought during the trials as well.