Setsuna is a fictional character from the anime series 'Kaifuku Jutsushi no Yarinaoshi', also known as 'Redo of Healer'. She is a demi-human slave who becomes one of the main companions of the protagonist, Keyaru. Setsuna is characterized by her wolf-like features, including ears and tail, which are typical of her tribe. Initially consumed by a desire for revenge against those who wronged her people, she becomes loyal to Keyaru after he helps her achieve her goals. Setsuna is notable for her fierce combat skills and unwavering dedication to the protagonist's cause.