The Bomber (爆弾魔, Bomā—base kanji lit. "Bomb Devil/Demon") is a trio, composed by Genthru, Bara, and Sub, whose goal is to finish the famous game Greed Island, and to accomplish that, they do not hesitate to kill or to blackmail other players to get their cards.[1]
The relationship among the members of the group seem to be higher than a simple alliance. Genthru, normally a cruel person, seemed to care for his teammate Bara by placing his wellbeing above his own[2] and similarly, Sub did the same to Genthru.[3]
The Bomber's power consists basically of Genthru's CountdownNen ability, but when Genthru, Bara, and Sub put their thumbs together and speak the keyword "Release" (解放, Rirīsu) in unison, the time bombs planted by Genthru will explode simultaneously independently from the timer.[4]
Trivia
Though the name of their trio is the "Bomb Devil(s)" (爆弾魔, probably: Bakudan Ma), the group is actually pronounced "Bomber" (ボマー, Bomā) as indicated by the furigana in the Japanese text.
A less likely translation of the kanji, than the more appropriate by context "Bomb Devil(s)" or "Bomb Demon(s)", is "Bomb Magic".
Genthru is the only member of the trio who doesn't have a tattoo on his forehead.
Kazsule's Alliance believed the Bomber to be either a Manipulator or an Emitter;[5] in reality, he is neither, as he was revealed to be a Conjurer.
All three Nen types are however included in Countdown[1] and it is possible that Sub and Bara fall under the Manipulation and Emission categories in order to help create the bombs.