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 extremely selfish and values her life over the lives of others, stating she has no problem sacrificing others in order to save herself.