Shigeo Kageyama, nicknamed "Mob" (モブ), is the protagonist of the Mob Psycho 100 series, as well as assistant and disciple of Arataka Reigen. He is the newest member of the Body Improvement Club. As a child, Mob learned that his psychic power was linked to his emotions. Strong negative emotions can cause him to hurt others, something he strongly dislikes and avoids. Therefore, he generally tries to keep his emotions in check. He is rather socially awkward. He is incapable of "reading the atmosphere," which has lead to him having a lack of friends. Mob is very compassionate. He is forgiving, kind and helpful. He tries to be kind to others in many instances. He is morally opposed towards using psychic ability against other people. Another principle of his is that psychic ability does not make him or others inherently better and that his psychic ability is not something that he requires in life. This belief leads to conflict. (Source: Mob Psycho 100 Wikia)

Alphonse Elric is a human child who lost his body during a forbidden alchemical transmutation to bring his deceased mother back to life, and had his soul transmuted into a suit of armor by his brother, Edward Elric. Al's blood seal lies just below the base of the neck at the back of the suit, on the inside. It is drawn with Ed's blood. According to Edward, he needs to be careful whenever he reconstructs Alphonse's body because he must keep the blood seal intact during the transmutation. If the blood seal is removed, Al's soul will be lost. "Kindness in a can." - Edward Elric (Source: Wikipedia)