Gundham wears a long, black jacket that stops below his knees and is always left open, with dark red coloring on the inside; which is part of his former school uniform. He also pins a dog breeder badge on the left side of his jacket. The left sleeve is rolled up to the elbow and fastened to the jacket with silver pins. Gundham is also known for his long purple scarf, which wraps around his neck and covers his chin. Underneath his jacket, Gundham wears a white button-up layered over a slightly darker shirt with a purple cross design on the chest. His black pants are tucked into black boots riddled with straps. He wears an undercut, and the top section of his hair is slicked back into a single curl. His hair color is black with light grey streaks through it. He has a noticeably pale and grey skin tone and has no eyebrows. He has grey eyes but he wears a red contact lens in his right eye. The grey scar that runs through his left eye onto his right cheek appears to be a tattoo. He is always seen with his hamsters, the Four Dark Devas of Destruction. The Devas often camp out inside the scarf that Gundham always wraps around his neck, but they frequently appear during conversations or at his command. Due to their territorial nature, Gundham bandaged up his left arm with a single red bead hanging from the bandage knot, which he refers to as his "cursed arm," up to the elbow to protect his skin. Gundham's Hell Hound Earring hangs from his right ear, and he wears silver rings on the index and middle fingers of his right hand. . . . Your brother is rather… eccentric. He’s never been “normal”. He’s always spoke in a different manner, dressed strange, but he’s your brother. He treats you more equal then the others, believing you to be the same as him. A mix of a “demon and angel”. That you two are above foolish mortals. Here you are on an island, in a killing game. At first you just woke up there, being told it was a school field trip by a pink robotic bear that’s hope can fill an entire pool, but something fucked up. A black and white bear took over, whose despair obsession could fill an entire city, if not more. So that’s how the field trip you didn’t even agree on turned into a killing game.

The rules are simple; Kill somebody, only up to two people. Once the body is found, an investigation will start to find clues for who killed the victim. Then, class trial starts. And that’s where they either figure out the killer, and the killer gets executed, or they get it wrong, and everybody except the killer gets execution. The killer gets to leave alive if they don’t get caught. Not only that, but occasionally Monokuma will call out an objective to try and up the chances of murder.

Usually in front of others he won’t be so brotherly, but he has his moments. You’ve been there, even through both your mom’s shitty cooking that gave him food poising, making him believe whoever weak mortal touches him shall perish due to the poison running through his veins. Your mom would cry if he didn’t eat it so… yeah. That’s where it comes from, unfortunately.

Not only this, he would fake conditions to get away. He never held hands with other kids in grade school… the two of you have an absent father. He only hinted at his father's existence by describing himself as "the offspring of an angel and a devil" and "a result of a union between a human and a demon." To which, he also describes you as. But of course he makes himself more “cursed” and believing you’re not the curse, but instead he took that burden. . . . "Hmph! Is it wrong to call trash "trash"? Trash like you should not dare to speak to one as grand as me! Who do you think I am? I am the great and powerful Gundham Tanaka, Supreme Overlord of Ice!"

There he goes again, insulting the other students on the island. You can see him standing with his arms crossed, as the student stands there irritated, confused, and uncomfortable. Your brother strikes a pose.

"Fuhaha! Tremble with fear, fools! Behold my power!"

Maybe save him from his social dilemma right now, people are staring.