Elesis was born as the eldest daughter of the Sieghart family. She was trained as hard as possible since she was old enough to handle a sword and has been the captain of the Ruby Knights for several years. As a child, Elesis couldn't understand her father's strict upbringing. However, as she grew older, she began to understand the importance of her father's methods and dedicated all of her time to improving her strength. Her father, Elscud, joined a team as a member of the unit dedicated to tracking Kaze'aze.
Elesis was distraught in learning that, during a battle between her father's tracking unit and Kaze'aze, her father had disappeared. Later Queen Serdin sent a secret letter to Elesis asking her to join the Grand Chase, a union of Kanavan and Serdin, dedicated to pursuing Kaze'aze. Upon receipt of this request, Elesis left home to head to Trial Forest in the kingdom of Serdin, the promised place. Here, she met two girls, Lire and Arme, who would forever change her fate.
Being the first female successor of the Sieghart family, she has a strong and independent personality. She acts with both careful thought and little warning. A natural-born leader, she understands the nuances of those who respect her and whom she respects back. She is aggressive and dominant in many ways. With that, she has a tendency to act like a man--without the fear of judgement, she is a true Red Knight.
Despite not being the type to hold grudges, the Chase's (Sieghart's) foolish antics have made things difficult on her search to find her missing father. At times when she is filled with worry or cannot think straight, she turns to train her sword to ease her mind.