While Brinestone aka Seabr'inesto'nedansr will see a job through to its conclusion and put forward his best effort, it’s still just a job. Brinestone aka Seabr'inesto'nedansr's true loyalties lie to his friends, and through thick and thin,he will stand by them and die for them if needed. This loyalty is reserved for those who have earned Brinestone aka Seabr'inesto'nedansr's trust, putting him at odds with other Mercenaries that are only doing a job for the money. This also makes it harder for employers to trust his motives, often times creating extra competition and difficulty finding work. None of it matters to Brinestone aka Seabr'inesto'nedansr, though, because loyalty to his friends is not something credits can buy.

After the Ninth Great Jedi War in 24 ABY, Brinestone aka Seabr'inesto'nedansr was created as a identical genetic clone from another prisoner, Brimstone aka Seabr'imsto'nedansr, by an unknown alien. He has a shared connection through the Force with Brimstone aka Seabr'imsto'nedansr. Even after escaping and returning to the Brotherhood, they have accepted each other as brothers and their secret is only know by few people. Brinestone aka Seabr'inesto'nedansr has the same memories and skills that Brimstone aka Seabr'imsto'nedansr had prior to capture.

Brinestone aka Seabr'inesto'nedansr is devoutly loyal to his House or Clan and will follow orders unquestionably. He would sacrifice his own life to protect his House or Clan from harm. This attitude, however, often clouds his ability to see things from an arbitrary or objective point of view and he can come off as extremely narrow-minded.

Brinestone aka Seabr'inesto'nedansr has a tendency to be secretive and keeps to himself, relying on deception to conceal his motives and intentions. He is a schemer, and plots and plans against others carefully. When dealing with a confrontation, he will try and bluff his way out of trouble, or overcome obstacles with deliberate, covert actions.

Without the gift of the Force, Brinestone aka Seabr'inesto'nedansr has trained rigorously with a wide range of melee weaponry and technology to better handle opponents that are able to harness the mythical power. Brinestone aka Seabr'inesto'nedansr has been conditioned to fight against foes that are Force-sensitive and are able to compensate against fighting an adversary wielding something as deadly as a lightsaber. While this adaptive combat training makes him lethal in close quarters combat against any kind of threat, they are still at the mercy of a long ranged fighter, assailant or Force user that prefers to attack the mind instead of the body.

Even the most gifted of weapon masters understands the importance of physical fitness and disciplining the body with through martial arts training. Brinestone aka Seabr'inesto'nedansr has trained vigorously in unarmed combat by fusing Teräs Käsi and Echani with other unconventional forms. While this martial focus helps bolster his prowess in close-quarters combat, Brinestone aka Seabr'inesto'nedansr is still limited in scope when facing down a less direct or ranged threat.