Elizabeth is very polite, grateful and caring, and though initially appearing to be fragile and frail, she is in fact very brave and courageous. Her selfless attitude and bravery are demonstrated when she willingly tries to rescue a child from Friesia's attack which earn her some form of respect from the Deadly Sins due to her courage. On the other hand, she is also a fairly gullible person, always being tricked by Meliodas's antics. Elizabeth has a relatively low self-esteem, always saying that she is just a burden to the Deadly Sins since she is unable to fight back.

    Elizabeth is always been seen fondled by Meliodas, but she appears to not mind it after listening and believing Meliodas' excuses. She begins growing more casual with Meliodas perverted antics, blushing less. Despite being a princess, Elizabeth shows a lot of respect and trust towards the Seven Deadly Sins even though there are several bad rumors about them - she even addresses them with the titles, lord and lady. Elizabeth is very strong-willed, as shown when Veronica died, she remains determine to continue stopping the Holy Knights - she only cries when she is alone, not letting others see tears. When Gowther stated that she likes Meliodas, she immediately blushes and becomes bashful.

    Not much of Elizabeth's early life, and the circumstances surrounding her adoption by Liones's king and Danafor's destruction have been revealed. As a child she would often play with Gilthunder, Howzer, and her adopted sisters, Veronica and Margaret, the latter having given Elizabeth an earring containing the symbol of the royal family.

   After the Holy Knights staged the coup, she escaped from the castle and, clad in rusting armor, began a journey to find the Seven Deadly Sins, the sole individuals she believed could match the Holy Knights' strength. By the time she had reached Kaynes Village, her armor had rusted, and she was constantly disappearing and appearing, and repeated delirious-like mutterings of "Seven Deadly Sins" which had led the villagers to name her the "mysterious Rust Knight".

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