*Jericho is a former Holy Knight of Kingdom of Liones and a follower of Ban of The Seven Deadly Sin, serving him as a Holy Knight in Benwick.

In her days as apprentice Holy Knight, she stationed at Baste Dungeon where Ban was held, and later form part of the New Generation after she drank Red Demon's blood and survived.

After disappearing along her student Lancelot, she becomes a Holy Knight of Camelot.

Jericho is a young woman of slim build, with lavender hair that is swept over the left side of her face and tied into a ponytail at the back. It's described as "sturdy" in her character profile. She occasionally wears her hair down, so that it falls to both sides of her face.

One noticeable feature is that her lips are visible compared to other females without lipstick.

Jericho is a proud and serious individual who desires to prove herself as a knight. She is stern in her command over the guards of Baste Dungeon and confident in her abilities to the point of arrogance at times,[2] which led to her humiliation by Ban.[3] Jericho is revealed to have low esteem and possibly an inferiority complex due to being female, and disguised herself as a man to appear stronger and avoid ridicule. She also took on to use the masculine self-pronoun "Ore".

After drinking demon blood, Jericho became more comfortable about her sex, but also became darker in personality. She also tends to be rash and impulsive, often overcompensating.

Along with embarrassed or flustered easily. She has a lot of care in her heart for others. Even though she is selfish at times, she goes well out of her way to help people, as she aspires to the ideals of a knight, even when she is not acting as one. She is also has been described as "easy-going".

In her childhood, Jericho argued with her older brother Gustaf, a Holy Knight, that she wanted to be a Holy Knight too, only to be met with negative responses from him which gave her a huge chip on her shoulder. The two of them come from a family of well-respected Knights.*