Dana

Dr. Dana (ダナ先生) is an elderly doctor who resides in Dalmary Town, and has a daughter named Cenette.

Appearance
Dr. Dana appears to be an ordinary and elderly doctor, who has considerable knowledge of medicine and herbs. He wears old fashioned round glasses and has a long, hairy beard.

Personality
Dr. Dana is shown to be a calm person. He is dedicated to his work as he didn't stop treating Meliodas even when Friesia was destroying the town. He cares deeply about his daughter as he was willing to poison Meliodas to have her released from imprisonment.

Baste Dungeon Arc
Meliodas was brought to Dr. Dana in order to heal the wound he had received from Gilthunder. As the doctor started treating the wound, he was surprised that the young man was still alive after having received very deep sword wound, and also a burn that resembled a lighting burn. While Diane was fighting Friesia, he made the unconscious Meliodas a special medicine he prepared, saying that it would give him "peace", for which he was thanked by Golgius a few minutes later. Dana then reveals that the medicine was actually a deadly poison made from Wolfsbane, Belladonna, Tiger Beetle Leaf and that Meliodas was dead. However, Meliodas awakes after Golgius tries to take Meliodas' sword, surprising Dr. Dana, since the poison was deadly and should have killed him. After Golgius quickly escapes, and Dr. Dana tries to follow him and soon finds Golgius, who was also found by Meliodas and Elizabeth at the same time. Dana begs the Holy Knight to return his daughter, since although Meliodas didn't die from the poison, Dr. Dana had made him drink the deadly poison, just as he was instructed. Golgius, however, disappears, telling Dana that he will return his daughter, but only in the afterlife, and fatally stabs Dana from behind.

After Golgius' defeat by Meliodas and the former's subsequent escape, Elizabeth rushes to his side to see and finds him in his apparent last moments. Dana then apologizes to them and explains that his daughter, Cenette, was kidnapped to force him into poisoning Meliodas, and he had just wanted to have his daughter returned to him. His hand then falls to the ground, with Elizabeth then bringing him back to his house. After the Weird Fangs are defeated and the Baste Dungeon, destroyed, he is shown to be alive, much to the surprise of Meliodas and Hawk, and is reunited with Cenette. He claims to not know as to what had happened and reveals that his huge wound had mysteriously healed very quickly, just like Meliodas' wound. When Cenette tells him that trying to kill Meliodas was not his fault, but Seven Deadly Sins' fault, he argues in favour of Meliodas, saying that although he tried to kill him, the young man saved his daughter and stood up against the Holy Knights without hesitation.

In the evening, he treats Meliodas, Elizabeth and the others to dinner to thank them and is doubts the fact that the Seven Deadly Sins are actual criminals, while thinking that he feels the presence of an immeasurably great will.

Abilities/Equipment
Dr. Dana, while not possessing any superhuman abilities, is a very skilled doctor, who is knowledgeable with medicines, herbs and poisons.

Cenette
Dr. Dana cares deeply about his daughter, going as far as to killing someone save her from imprisonment.

Golgius
Dr. Dana was forced to assist Golgius of the Weird Fangs. He made a deal with the knight in an attempt to assassinate Meliodas with poison, in order to save his daughter who was held as an hostage.