Elaine

Elaine (エレイン) is King's sister, and the Guardian Saint of the Fountain of Youth, who was killed by a demon from the Demon Clan in the Fairy King's Forest, and resides in the Capital of the Dead since her death.

Appearance
Elaine has long and thin eyelashes, and cut hair that reaches her neck. She wears a single one-piece dress which is tied together with a butterfly knot at the back.

Personality
Elaine is shown to be a kind, caring and forgiving girl, who cares deeply for Ban and is willing to forgive King for abandoning her and the kingdom, but is slightly disappointed and unhappy that he did so. Due to several humans repeatedly trying to steal the water of the Fountain of Youth with malicious feelings, Elaine came to distrust humans, but soon came to trust Ban when she read his mind, and even started to have feelings for him. She also seems to get embarrassed easily.

History
700 years ago, King abandoned and left the country, which forced Elaine to protect the Fountain of Youth in his place as its guardian and live hundreds of years of solitude.

Capital of the Dead Arc
When King turned Ban into a statue, Elaine was watching the whole thing and decided to help Ban by kissing him which turn him back to normal to King shock. Elaine said she was happy to see him again but also ask what happen to him due to the scar he got from Meliodas. Ban told her was from something but King interupt them and demand them why he can't see her own sister but then realize she was still mad at him for leaving her.

Ban notice a explosion from where Meliodas and Diane are and decided to help them. King continues questioning Elaine why she forgave Ban and not him, but Elaine simply replies that he left her alone for over 700 years whereas Ban gave her renewed happiness in just seven days. Before King says anything else Elizabeth and Hawk comes running by whilst trying to escape from Geera and when King turn around to see Elaine but she was gone.

When King defeat Geera, Elaine appear to tell them that Geera went back to the living world and the rest were about to go back there too, Elaine said her final goodbye to Ban and thanked King for protecting Ban.

Abilities/Equipment
When she was alive, Elaine was powerful enough to protect the Fountain of Youth by herself in her brother's place.

Abilities

 * Tree Manipulation: Elaine has the ability to manipulate the branches of trees in the Fairy King's Forest. This ability can be used to immobilize or harm individuals, with the branches acting her as limbs.
 * Wind Manipulation: She has a degree of control over wind, and uses it to blow physical objects away.

King
King is Elaine brother and was the king of they country. Elaine was upset at King for leaving her alone to protect the Fountian of Youth but was willingly to forgive him and ask him to save Ban.

Ban
When they first met, Elaine initially tried to kill him, thinking he was a normal bandit with malicious feelings. However, she soon understood he didn't have any malice when she read his mind, and later came to befriend him when he stayed at the Fairy King's Forest for a week, even coming to have feeling for him.

Trivia

 * In Arthurian legend, Elaine of Benoic is Lancelot's mother, and the wife of King Ban, who is the namesake for Ban.