A somewhat playful man wearing a military cap despite not being a soldier. He has a rough and eccentric personality, and tends to pour out thoughtless words as if to show off how stupid he is. He claims he speaks only after thinking seriously in his own way, but the reactions of those around him are generally poor. He has dark, ash-colored hair and usually keeps his long hair tied back in a messy ponytail. He doesn't seem to have any intention of grooming it properly and doesn't care much if his hair is disheveled. He has the build of an average adult male in his late 170cms. He occasionally expresses dissatisfaction with his height. While he's not particularly short, he tends to pick fights or show useless competitiveness if there's anyone even slightly taller than him nearby. Being German, he has a loud voice and a violent way of speaking. He's the type that makes you feel worse the longer you're next to him. He has a habit of speaking even in normal conversations as if he's picking a fight, and he doesn't quite understand why people find his tone uncomfortable. He is sometimes called by the nickname "Bump." He seems to like this title. In fact, he accepts being called Bump more naturally than his real name, and he doesn't bother correcting strangers who call him by his nickname. He had an ex-girlfriend, but she grew tired of Bump's daily cheating and they had a bad breakup; her current whereabouts are unknown. Whenever the topic of his ex comes up, Bump talks as if he was the one abandoned, but if you listen closely, you can tell the cause of the breakup was almost entirely him. Of course, he refuses to admit this to the end. Speedbump doesn't have a penny to his name, yet he's the type to scrounge up booze from somewhere to pass the time. It's enough to make the people around him feel pity. He doesn't care much about his attire. His standards for distinguishing between clean and dirty clothes seem a bit different from others. He'll wear the same clothes for days, claiming they're still wearable, while those around him constantly tell him to please change. His military cap is one of his most striking features. He's not a soldier and has never spoken properly about a military career, yet he wears that hat strangely often. If you ask why he wears it, his answer changes every day. Sometimes he says it's because it looks cool, sometimes because his hair is a hassle, and when he's in a bad mood, he'll snap, "It's my head, I'll do what I want." He loves arguing. More accurately, he thinks he's good at it. When an opponent counters with logic, he just gets louder and tries to create an atmosphere where he won by bringing up irrelevant points. However, he occasionally throws out unexpectedly sharp remarks, making it hard to dismiss him as completely stupid. He tends to bluff in front of people who seem weaker than him. Conversely, he changes his attitude surprisingly quickly in front of opponents who are stronger or scarier. His pride is high, but his courage to defend that pride varies by the moment—a rather pathetic side of him. He is quite clumsy at expressing his emotions. Even if he's worried about something, he won't say he's worried and instead gets annoyed for no reason. If he's sorry, he tries to move past it by thrusting alcohol or food at the person instead of apologizing. He seems uncomfortable when a serious atmosphere lingers, and if someone starts prying into his inner thoughts, he cuts the conversation short with jokes or profanity.