Yellow Bomber, also called Kiirobon in the Bomberman B-Daman Bakugaiden anime, functions as the core team's main comic relief. His personality revolves around an intense passion for money and entrepreneurial ventures, constantly taking part-time jobs and pursuing get-rich-quick schemes fueled by fantasies of wealth and romantic success. This financial drive is a defining trait. He displays a mischievous, attention-seeking nature with high self-regard, especially concerning his self-perceived comedic talent. His jokes consistently fail to amuse others and trigger a running gag where nearby technology malfunctions or environments distort during his attempts at humor. His constant companion is Ponycorn, a cheerful horse-like B-Daron partner wearing sunglasses and a corncob accessory, who typically laughs at his jokes despite their poor reception.

A streak of skepticism differentiates him from more naive teammates like White Bomber. He openly resents Black Bomber's unpredictable appearances and perceived efforts to appear cool, masking underlying jealousy and secret admiration. This complex dynamic surfaces during team searches for Black Bomber, revealing Yellow Bomber's conflicted feelings, including imagining Black Bomber acknowledging him in a dire moment. His loyalty to the team ultimately overrides his greed or personal ambitions during critical challenges. He demonstrates skill employing disguises for various plans, though their effectiveness varies.

In combat, he pilots specific B-Da Armors. His first mecha, the land-based Yellow Shooter, was the third protagonist armor deployed, prioritizing raw attack power and using the "Drive Shot" as its primary attack. After its destruction, he transitioned to the second-generation flying Yellow Crasher, similar in design to Blue Bomber's Blue Braver. The Yellow Crasher featured a unique sound transmission system converting the pilot's voice into amplifying sound waves via a cockpit microphone and integrated loudspeaker to boost B-Dama attack power. This system leveraged his talkative nature, notably disrupting an opponent named Shuringe enough to force her retreat. Its signature attack was the "Crasher Cannon." The Yellow Crasher later formed the left leg of the combined Saint Blaster, merging with White Bomber's White Blows and Blue Bomber's Blue Braver, requiring unified resolve from all three pilots. The Saint Blaster further combined with Black Bomber's Black Devastator to create the ultimate Saint Dragon, designed to defeat the Darkness Dragon and the Dark Koutei. In the Generation V continuity, he pilots the Cargo Yager, utilizing the "B-Da Shot" special attack.