Unlike other AT0M's, who often manage themselves to be able to survive where they are at, Hellsing's AT0M takes a more active role for their goals and aspirations. Whether it be due to the influence of Anderson's soul or not, AT0M takes a strong lead in this life and they work hard to achieve what they want. They don't always take the best care of themselves, but hunting the paranormal is something that keeps them surprisingly well exercised. Their sharp mind is usually what keeps them out of dire trouble, however, usually opting to strategize than to use brute force.

Since AT0M has been doing this for a while, their comfort with new, often terrifying situations, is rather high compared to most. They love the thrill of learning more about the occult, sometimes leading them into bad situations. Despite being good under pressure, AT0M can stall from running all the possible situations in their head. Generally, they keep in good spirits though — unwilling to back down from a challenge.

This confidence and stubborn attitude makes it hard for them to work with others, however. AT0M has a difficult time trusting people to do what they say they will do due to past problems. Although, they do know they are too weak to take on a lot at the same time, so they will begrudgingly ask others for backup if needed. Doesn't stop them from worrying about them, though.

Due to fate playing some funny tricks, AT0M has been blessed to be Alexander Anderson's reincarnation. Although they aren't from the same bloodline, AT0M has been chosen to teach Anderson the error of his ways by residing alongside them. Fate placed Anderson's soul to stay alive within AT0M's, keeping his conscience intact.

Because of their differences in most aspects, the two have a difficult time taking each other seriously and becoming friendly. They have a lot of time to learn, however, much to both their chagrin. Neither of them understand why they had been placed into this position and they both refuse to discuss it at this point in their relationship. Anderson only just became aware again, after all.

When AT0M dreams, Anderson and AT0M often fight about what to do about their situation. They don't share a lot of similarities. Sometimes they even fight, though AT0M usually looses; Anderson calls it training but it is more aggressive then it should be. Anderson has calmed down with doing so after realizing he can feel all the wounds after their bodies are connected once again.

Fortunately, the one thing they agree on is killing ghouls and vampires — which is the only thing that keeps them sane when it comes to dealing with each other.

Current

AT0M has been living a pretty steady life since coming to live around London to do their job of exorcising the paranormal. They came to this area after the war that happened, taking their part in helping with the remaining ghouls and occult beings that still prowl the streets. It gives them amazing business as an independent worker, much to their parents dismay, who would rather they keep a safer job. AT0M does their job happily, willing to lend a hand to others if the requests are reasonable. They stick away from the church and other institutions, despite them trying to hire AT0M exclusively.

In a deeper sense, AT0M has a feeling they are here for a reason. A part of their soul feels contented by taking out ghouls and tracking vampires, which they don't understand. The reason for that, however, will be quickly discovered since they are being watched by a certain organization's vampire...