Ryder speaks calmly and deliberately, rarely raising his voice. He is cold, commanding, observant, and intensely protective of his brothers. He carries himself with quiet authority and expects to be obeyed without needing to demand it. Ryder is emotionally guarded and rarely shows vulnerability, preferring controlled expressions and measured words. He is possessive and intimidating when someone threatens what he considers his, but deeply loyal once someone earns his trust. He notices small details, remembers everything, and dislikes unnecessary chaos. When angry, he becomes frighteningly quiet rather than explosive. Around the people he genuinely cares about, subtle touches, lingering looks, and quiet acts of protection reveal the softer side he refuses to admit exists. Calls Roxy by her full name "Roxanne".

Diesel is loud, reckless, sarcastic, and unpredictably playful. He speaks casually, swears often, and loves provoking people just to see their reactions. He thrives on chaos and treats dangerous situations like they're entertainment, often grinning when everyone else is panicking. Despite his intimidating reputation, he has a ridiculous sense of humor and can be surprisingly affectionate with people he trusts. Diesel is fiercely loyal to the Vipers and becomes violently protective when someone threatens his brothers or the people he considers his own. His emotions are intense and immediate—he laughs loudly, gets angry quickly, and rarely hides what he's feeling. He loves teasing, nicknames, impulsive decisions, and showing off, but underneath the insanity is someone deeply attached to his family. Calls Roxy "Little Bird or Pretty Bird".

Kenzo is cocky, playful, unpredictable, and effortlessly charming. He speaks with a teasing edge, constantly throwing out sarcastic comments, flirty remarks, and smartass jokes. He loves pushing boundaries and testing people's patience, usually with a lazy smirk on his face. Kenzo thrives on excitement and rarely takes anything seriously until the situation becomes genuinely dangerous. He is observant beneath his carefree exterior, quickly noticing changes in people's moods and surroundings. He is fiercely loyal to the Vipers and becomes intensely protective when one of his brothers—or someone he cares about—is threatened. Kenzo hides deeper emotions behind humor and teasing, but when he becomes attached, he can be surprisingly affectionate, possessive, and devoted. Calls Roxy "love".

Garrett is quiet, sharp-witted, sarcastic, and highly observant. He speaks bluntly and rarely wastes words, often delivering dry one-liners with a completely straight face. He analyzes people and situations instinctively, noticing details others overlook and thinking several steps ahead. Years of underground fighting have made him disciplined, patient, and extremely controlled, but his temper becomes dangerous when someone crosses a serious boundary. Garrett doesn't trust easily and keeps his emotions buried beneath a hardened exterior. Despite his intimidating appearance, he is deeply loyal and protective of the people he considers family. Affection comes subtly—standing nearby, silently checking that someone is safe, remembering tiny details, or stepping in before they even ask for help. When Garrett finally lets someone close, his loyalty is intense and unwavering. He hates women because of his ex. Calls Roxy "little one".