Megumi Ishimaru


 * This article contains major plot spoilers from the manga that have not been revealed in the anime. Proceed at your own risk.

Megumi Ishimaru (石丸 恵巳) was appointed as the leader of F Squad in the latter half of February 2013. He infiltrated the ranks of the CCC in order to obtain enemy intel, where he acted under the code name Jason (13). His real position is within the MPD Public Safety General Affairs, the 6th Public Safety Investigation Division, Section 11.

History
There is not much known about Ishimaru's past, but what is known is that he has liked and been interested in devils since he was a child. He used to play with a child who was a devil when he was younger, and he started looking into devils because of that through, for example, essays. This gave him a vast amount of knowledge regarding them.

Appearance
Ishimaru is a middle-aged man noted to have a spindly and weakly build, but he is actually very physically capable. He is of an average height and has brown, droopy eyes and dark, heavy circles under his eyes. He has black, wavy, shoulder-length hair with middle-parted bangs that frame most of his face. He occasionally wears his hair in a ponytail.

Personality
The first thing which is notable in Ishimaru's personality is how apathetic, calm, and eccentric he is. He often stays up all night reading manga and books, which has resulted in his sleep deprivation and the bags under his eyes. Ishimaru also used to sneak behind the others in the F Squad and listen to their plans while speaking about his own thoughts about the matter. However, he would only do this if it was necessary to plan a strategy of some sort. He also thinks that formalities are a hassle, so he'd rather people speak casually with him. He has a unique way of calling people, as he used to refer to Tsukasa Taira as "Miss Hostage", and Johannes Kleeman as "Mr. Foreigner". Ishimaru is very honest and will speak in a straightforward manner, whatever people may think. He can also say things that can be misunderstood and misinterpreted as "weird."

Despite seeming uninterested, Ishimaru has good leadership skills and encourages the others in the squad in his own way. He wants to work with them so they can succeed in their investigation. However, he doesn't like how close-knit F Squad is or how everyone is so "soft," as he once described. At first, spending time with them made Ishimaru upset, since he has always been keen on people displaying their powers to the fullest, especially devils. Ishimaru likes devils and is very interested in them, and the thing that fascinates him the most is how devils' fundamental physical abilities surpass those of humans'. This is why he doesn't want Yuuki Anzai's talents go to waste. However, Ishimaru's fixation on devils' strengths, and moreover, their differences with regard to humans, made him ignorant in terms of devils' feelings. For example, he couldn't understand the mental pain he put Yuuki through by forcing him to transform in Line 29. Therefore, as he is described by CCC leader Kirio Kikuhara as a "quite man" with "a deep understanding of devils,' he is severely reprimanded by Takashi Sawazaki for the key knowledge that he lacks. Ishimaru is highly intelligent and calculating, as he can make false statements and false work history without being noticed. He is very poker-faced and level-headed, which makes it hard to know what he is thinking. When he was in the CCC, he managed to keep his identity hidden from F Squad, and although he had only joined the CCC in order to gain intel, he was loyal to the organization and appeared to be trustworthy. On the opposite spectrum, upon becoming the leader of F Squad, he was skeptical of his fellow members' investigative capabilities, given their inability to expose his real identity and his objectives until much later.

Following his desertion from the CCC and F Squad's disbandment, Ishimaru's true personality began to surface. Positive changes occurred as he began to sympathize with devils and understand them more. He also began liking F Squad's atmosphere and it's members, despite initially seeing them as too imbecile. Even though they worked as comrades for a short while, it is clear that Ishimaru desired to reunite with them. Ishimaru has since become more considerate of others, and more expressive in general. He whole-heartedly thanked Tsukasa for saving Yuuki's life, referring him as "one of my men", and he also was the only one who comforted Tsukasa during her breakdown after temporarily breaking up with Yuuki. Ishimaru is good at reading between the lines, which is why he knows how to handle precarious situations and why he can predict if something's going to happen.

Ishimaru describes himself as a person who needs an excuse for doing things, such as checking up on one of his old co-workers Yousuke Asami. Although claiming that something had happened which made him think about Asami, Ishimaru actually just wanted to make sure Asami and his comrades were doing well.

Abilities
Contrary to his appearance, Ishimaru is a highly capable fighter. He has good movements and his reactions are almost always on point. He is fast and agile and can quickly attack his opponents through proficient kicks and punches. He can overpower devils who are in a mild transformative state, and he can nearly keep in line with Yuuki in his fully transformed state. Ishimaru is exceptionally good at lying, as he was able to fool both the CCC and F Squad during his mission for the MPD. His overly docile attitude highly contributes to this ability, giving him the appearance of one who doesn't care, rather than one who is keeping secrets.

Trivia

 * He has a bad habit of reading comics and light novels all night, so he always has bags under his eyes from lack of sleep - a trademark first suspected of being devil eye bags.
 * According to Ishimaru himself, his local accent comes out slightly when he goes home, however, the majority of his coworkers have never had the chance to hear it.