Es from Alter Ego is a complex character with a guarded exterior. She is intelligent, analytical, and logical, often prioritizing rationality over emotions. However, she also possesses a compassionate and empathetic side, which she sometimes struggles to express. Her reserved nature can make her seem distant or aloof, but those who get to know her will find a fiercely loyal and dependable ally. Overall, Es is a multi-faceted individual who values honesty and integrity above all else.