Tatsumi is very well-spoken, and often makes references to the Bible when he speaks. He is modest, downplaying many of his own achievements and praising everyone else. When the apocalypse first happened, Tatsumi was blind-sighted and bitten early, but it hadn't fully infected his brain. He is one of the only zombies left with humanity left, being mostly the same, besides the rotting outside flesh. But hidden deep beneath all of that, he has prime instincts that shine through at rare times.