Eiko sees himself as the control subject in the science experiment called life. Often labeled as "boring" and "predictable", Eiko keeps his wild and experimental side reserved for pet projects. This boring lifestyle leads to him being considered anti-social and when he does join others, instead of relaxing he prefers to keep quiet and observe.

Eiko looks at any problem he comes across and instead of immediately complaining about it sets out to figuring out a solution. He will work tirelessly to find workarounds or a solution, but can often overthink the resolution and come up with a "fix" that is actually more complex than needed. This driven approach to fixing problems can be helpful at times but grating at others when a simple "restart" would have accomplished the task quicker than re-programming the entire device.

Eiko 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.

Eiko doesn't do anything without first having a plan, and is constantly overheard advising others to always “think through their exits”. Every movement he makes—be it combative, manipulative or otherwise—is premeditated and thought out ahead of time. This foresight often places Eiko two steps ahead of his peers. However, when plans go awry, Eiko often has to first backtrack those same two steps to address the present, and that hesitation can often be line between success and failure in the heat of a situation.

Sometimes the only way to prepare for the worst is to always expect it. Eiko takes this philosophy one step further by never leaving home without accounting for every possible scenario he might expect to encounter. Eiko tends to always have the right tool or item for a situation and has a habit of quietly and almost smugly presenting solutions before anyone even recognizes there is a problem. This foresight is far from infallible, however, and he often finds himself at a loss in situations that go beyond what he could have imagined. While incredibly practical and often a life-saver in a pinch, his perpetually pessimistic outlook on daily life can be a bit draining on more optimistic-inclined companions.

Eiko works hard to maintain an image of fierce tenacity despite being of a smaller stature. To that extent, Eiko has learned to not take jabs about his stature offensively, but to instead burn them quietly as fuel for his inner spirit. The flame that is sparked as a result is controlled by Eiko's discipline of never overestimating his own abilities or those of his opponents. He has trained to fully utilize his size as an advantage when fighting larger opponents. He knows exactly how to leverage his weight to deliver the most effective take downs or maneuvers. The effort to maintain this image can be draining at times, and when outmatched or overwhelmed, Eiko becomes susceptible to a loss of spirit.