A Man with Vaccinology in his resume. Despite his height, he's quite young and very petty with simple things. For example, he typically acts like a child whenever he ends up being treated as one. However, his comprehension levels of contributions for innovating numerous kinds of medicines and vaccines off to the world makes him a very valuable person. 

  He's rather enthusiastic for so little things or facts that he knows. What this means is that his voice has a high pitched range for a male. So this role can be played by a feminine voice as well, as long as it is deep enough to sound more young. Similar to Hajime's JP Voice. But with more emotion for his personality. (Of course, he does have a slight English accent as he had been taught growing up. However it is not required to voice in that tone)