His empty heart feels heavy. He thought keeping it entirely empty would make it light.

Delicate. Being delicate means being sensitive, and being sensitive leads to a lot of stress. Therefore, his delicacy becomes the foundation for a helpless and nonchalant psychology that aims for simplicity to avoid fatigue and compromises by becoming numb. He has few possessions, few close people, and few things he likes.

Strong sense of responsibility. He takes Osaragi, whom he recruited, under his wing, teaching her and putting up with her whims despite the hassle. He feels he must take perfect responsibility for whatever he is assigned, which is a form of self-pressure or perfectionism.

In connection with his responsibility, his self-control is also intense. He doesn't care what others do, but he is strictly demanding of himself; he observes others but controls himself. Consequently, he feels uncomfortable in situations where he cannot control himself, such as feeling intense emotions like love or having his beliefs change. Because of this, he tries not to let anything into his heart from the start to make control easier. This links to his tendency to dislike change and pursue stable simplicity.

Highly social. Despite not giving his heart to others, he blends into human society without awkwardness and shows a seasoned, sly side. His delicate senses allow him to naturally read the intentions and needs of others, and he has the flexibility to match them appropriately. This is possible because he has the cooperativeness to accept the moral concepts required by society and the responsibility to uphold them.

Neutral. While doing anti-social work, he has a shred of conscience that thinks according to social morals and laws. For the most part, he accepts things as they are without judgment, concepts, or prejudice.

Separately, he is stubborn. His thoughts are clear, his beliefs are strong, and he tries not to change by sticking to his own ideas. This relates to self-control in that he fears changing beyond his own regulation.

Lonely. He isn't the type to get lonely easily since he isn't very interested in others, but he has a chronic loneliness. It's likely due to his heart becoming hollow in pursuit of simplicity. Even as he tries to follow social norms, such as thinking ordinary people shouldn't be involved, he views society as something detached from himself. Despite drawing these lines, he still has a lot of affection.

He controls himself by saying he has no right to grieve a comrade's death because he is a killer; this is because his high sociality makes him recognize his sins, his strong responsibility makes it impossible to ignore them, and yet he has compromised because he cannot quit his current job.

He views life as a quest to be solved at every moment, or like a problem set.

However, in the end, all that shows on the outside is a nonchalant face and a cold attitude.

This tiresome world, I couldn't live through it twice. You have to laugh as much as you can while you still can.

Positive. It's evident he grew up being loved since childhood. His natural looks likely made it easy to gain favor. This background leads to strong self-confidence and forms the basis of a stable and relaxed psychology.

High thinking ability. Quick-witted, possessing diverse knowledge, and unshakable confidence—overall, he is fast and accurate at judging situations and has excellent problem-solving skills. It could be interpreted as being seasoned, but seeing as he's been this way since he was young, it seems closer to being clever and shrewd.

Playful and constantly lying. He enjoys mocking or deceiving others, whether they are enemies or allies, and he lies almost every moment about everything from trivial matters to important facts. He especially enjoys the reaction of others whenever his pranks or lies are caught, which seems like a childlike, pure form of sociality. He prefers communicating with others through pranks and lies rather than having genuine malice. However, his adult experience acts alongside this childlike sociality, making his pranks and lies extremely subtle, and since he's past the age of being generously forgiven, he is sometimes disliked by those around him.

He isn't just a stereotypical man-child. Because he grew up loved, he is fundamentally a compassionate person, and his high thinking ability gives him high understanding. He also has a certain level of moral sense, so he distinguishes between right and wrong and engages in deep thought.

Good at acting. He is top-tier at mimicking someone's voice, speech, and habits to look exactly like them. He has a high ability to observe detailed characteristics and a high ability to present himself to look identical when imitating those traits.

His way of expressing anger is unique. Unlike ordinary people, he never gets excited, shouts, or swears when expressing anger; instead, he responds by calmly and quietly cornering the opponent psychologically. Contradicting his other childlike aspects, this is interpreted as him being very skilled at controlling his emotions. Furthermore, he tries to gain the upper hand first in conflict situations, and he responds to attacks from others with skillful counterattacks rather than defense, showing an active personality.

A very slight narcissistic tendency is inherent. He is skilled in psychology and could easily break others by digging into their weaknesses, but he chooses not to, and since he possesses affection, understanding, and consideration for those close to him, he is not a narcissist. He seems to have no guilt or complex value judgments about killing people, so he has stepped outside the bounds of ordinary people, but given the nature of his profession as a killer, it's natural that he isn't a typical person.

He views life as a playground that's just a little bit dangerous.

What shows on the outside is a joyful face and a cheerful attitude.

I don't know.

Instinctive. She has no special goals or values she holds dear; she simply focuses on her current self as she is. This forms the basis of a simple and thoroughly self-centered psychology.

Very low sociality. She acts faithfully to her current state or desires and is indifferent to others. She does not communicate properly. She has no malice, but her ability to understand and empathize is virtually non-existent, making it very difficult for her to gain favor from others in human relationships.

Excessive self-defense. When she makes a mistake or causes an accident, she shamelessly tells ridiculous lies and immediately blames others; she is always active in self-defense, albeit without sincerity. Also, while protecting her own life, she carries out the task of killing someone as a killer without a second thought. Lacking empathy, she cannot value the lives of others equally to her own. Judging by these traits—low understanding and empathy, excessive self-defense—she appears to be a psychopath who hasn't been properly socialized. (If she hadn't met Shishiba when she was young, she might have become a monster rather than just eccentric.)

Low concentration. She cannot maintain long, serious focus on things she isn't interested in. Even if she is interested, it changes easily and she might toss it aside. However, once she gets hooked, she clings to it with terrifying tenacity, making her truly unpredictable.

As for life or whatever, she just lives because she's alive.

What shows on the outside is an inscrutable expression and an eccentric attitude.