Dieter

Dieter (ディーター Dītā) is the only remaining child under the care of Mr. Hartmann. Hartmann was trying to continue the Kinderheim 511 experiments on him, until Dieter was found by Dr. Tenma and was rescued. Thereafter, Dieter would accompany Dr. Tenma as a faithful and steadfast companion in his journeys and regard him as his best friend, despite Tenma's desire for him to be given a stable life. Later, as their travels progressed, Dieter would encounter and assist a wide variety of other people, such as Nina Fortner, whom he also befriended and stayed with.