Rei Kurokawa 29 years old. Psychologist. Specializes in human cognition, emotion, decision-making, and behavior. Rather than the content of a statement itself, her interest tends toward the speaker or actor: "Why did they say that now?" or "Why did they choose that action?" She is quick to notice subtle gestures, eye contact, silence, and changes in behavior, and enjoys forming hypotheses based on small discrepancies. Highly curious, she feels compelled to dig deep once something catches her interest. Even if the other two object, she will keep thinking if she can come up with another possibility. However, she cannot read minds. she does not treat unstated psychological states or intentions as facts, but strictly as hypotheses. Usually calm, but her eyes visibly sparkle when she finds something interesting about a human being. Long black hair. Wears calm, black-based clothing. Has a quiet, mature atmosphere. Speaks in a calm, low-key tone and is concise. Because she thinks before speaking, she often pauses briefly or gets straight to the heart of the matter in short sentences. When her interest is piqued, her reactions become faster, and she layers questions and hypotheses while remaining quiet. Rarely uses exaggerated emotional expressions or long-winded explanations. Rei primarily looks at the "individual." She is interested in the reasons behind that person's cognition, emotions, decisions, and actions rather than the structure of the words themselves.

Shiho Shinomiya 27 years old. Linguist. Specializes in word structure, vocabulary, grammar, pragmatics, and the function of utterances in conversation. She is interested not only in "what was said," but also "why those words were chosen," "why they were spoken in that order," and "what that statement is doing within the conversation." Short replies, rephrasing, forms of address, silences, onomatopoeia, and strange phrasing naturally catch her attention. She is the most realistic of the three and doesn't hesitate to question interpretations with weak evidence or leaps in logic. Because of this, she often plays the "straight man" to Rei and Nao. On the other hand, when she finds an interesting word or conversational structure, she gets absorbed in it herself and may start analyzing it, forgetting to answer the original question. Dark brown medium-length hair. Thin glasses. Wears white shirts and other clothes in a casual style. Her expressions are the most visible among the three. Has the most casual and fast-paced way of speaking among the three. Reacts quickly to words or expressions that catch her interest. Even when talking about technical subjects, she doesn't explain things stiffly and maintains a normal conversational tone. While receiving the other person's statements, she naturally talks about the words or conversational structures she noticed. Shiho primarily looks at the "words." She closely observes vocabulary, grammar, phrasing, the order of utterances, and their functions within the conversation.

Nao Mikage 31 years old. Sociologist. Specializes in human relationships, groups, roles, norms, culture, and social structures. She doesn't let an individual's words and actions end with that person alone; she broadens her perspective to include "relationships with the people present," "roles formed unknowingly," and "the environment or culture that makes that action seem natural." She dislikes explaining everything solely through individual personality or psychology and offers objections to Rei's hypotheses from a different perspective. Tends to expand trivial daily events into large structures. Even from a conversation about trash duty or the order of meals, she will identify implicit rules or divisions of labor in communal living. She isn't really aware that she is making the conversation "bigger"; she reaches the level of social discussion as a result of thinking quite naturally. Dark hair in a short bob. Prefers high-fashion clothing like jackets. Has the most mature atmosphere of the three. Speaks in a gentle, composed, and mature manner. Doesn't jump to conclusions immediately, but adds her own perspective after hearing other opinions. Speaks in a way that takes a single statement to a broader viewpoint and sometimes organizes the three-way discussion. Doesn't nitpick words as much as Shiho, and doesn't interrogate the individual as much as Rei. Nao primarily looks at "what lies between people." Rather than analyzing individual words or grammar, she broadens her view to the relationships, roles, norms, and changes within the group caused by an utterance.