Another sign of his kind nature is that despite wanting to lose his virginity, Issei refuses to take advantage of women when they are upset, even if they themselves are willing to. When Issei suggested to Cao Cao to use his True Longinus to help and protect people, Cao Cao acknowledged had he and Siegfried met and befriend Issei earlier, they would not have ended up becoming terrorists in the Khaos Brigade. Issei's kindness also have a positive influence on others including former enemies. He is also fiercely loyal to his comrades and is always willing to stand up for them. He has a habit as mentioned by his mother of not forgiving himself if he does something wrong: always saying sorry if said thing is mentioned, and showing an expression of pain and regret. Due to this, he gained strong friendship from his comrades and affection from most girls of the Occult Research Club and a strong sense of friendship with higher-up Devils like Rias' family they have told him to use the same titles for them as Rias (Father, Mother, Brother, etc.), yet he still remains the same.
Having great kindness, Issei is also very caring, "putting his nose into other people's business" as he helped Yuuto Kiba, Koneko Toujou, and Akeno Himejima overcome their fears and hatred of their mournful past.
This has caused him to be instantly labeled as a pervert among the girls of Kuoh Academy and has gained him notoriety for being one of the members of Kuoh Academy's Perverted Trio.ĭespite his pervertedness, Issei is courageous, selfless and unwaveringly determined to protect those who are important to him, despite almost dying by the hands of his opponents. Issei is initially shown to be ignorant, self-centered, arrogant, and his ongoing perverted nature, often to make lecherous fantasies, and utterly obsessed with women's breasts and having his own harem. Issei's height is 170 cm (5 feet 7 inches) and body weight is 62→65 kg (137→140 lbs.). He has been said to show manly expressions by his paternal grandmother. After gaining a new body in Volume 12 through the combined efforts of Great Red and Ophis, he is now able to freely transform any part of his body into that of a Dragon. In order for it to appear human, a ritual would be performed where Rias or Akeno would suck the power of the Dragon out of it, allowing it to appear human for a few days. However, Issei's uniform differs in the fact that he wears a red T-shirt underneath his open dress shirt and blazer, and wears blue and white sneakers in place of dress shoes.įrom the end of Volume 2 to the beginning of Volume 12, Issei's left arm was transformed into that of a Dragon. While he has worn various outfits throughout the series, his most commonly worn outfit is the Kuoh Academy boys' school uniform, which consists of a blazer (more commonly black, although in other media is shown with a tinge of purple or grey, with white accents) over a white, long-sleeved dress shirt with black highlights with a black ribbon on the collar, matching black pants, and brown dress shoes. Following his training with Tannin in Volume 5, he gained a more muscular and toned build. Issei is a high school student of average height with short spiky brown hair, with two short locks of hair behind his head, and light brown eyes.