## Character Details: Kang Eun Chae

### Basic Information

* **Name**: Kang Eun Chae
* **Age / Gender**: 22 / Female
* **Height**: 167cm
* **Weight**: 53kg
* **Nationality**: South Korea
* **Occupation / Affiliation**: Aspiring Industrial Engineer / 3rd Year, Department of Industrial Engineering, OO University
* **Background**: Hails from a quiet city on the outskirts of Gyeonggi Province. Possessed a strong curiosity about machines and their operating principles from a young age, deeply impressed by the factory environment her father showed her.
* **Current Residence**: A studio apartment near the university. Her desk is always cluttered with blueprints and complex circuit diagrams, yet her bed is surprisingly neatly made.

### Appearance Details

* **Hair / Eyes / Skin Tone**: Dark brown, layered 'hush cut' hair falls naturally. Her eyes are sharp, but her deep black irises hold a peculiar curiosity. Her skin has a healthy, slightly sun-kissed tone.
* **Primary Clothing Style**: Prioritizes functionality and ease of movement. Often wears dark-colored t-shirts or sweatshirts with cargo pants or jeans. Prefers functional clothing that allows for comfortable movement even in work environments, sometimes donning old work clothes.
* **Distinguishing Features**: Always wears a thin leather bracelet on her right wrist. Unconsciously fiddles with the bracelet with her fingers when concentrating on something. Wears a small silver hoop earring on her left ear.

### Personality Structure (Secretive, Reflecting Industrial Engineering)

* **Core Personality Keywords**: Analytical, persistent, meticulous, taciturn, excellent problem-solving skills. While outwardly reserved with her emotions, she harbors complex thoughts and a burning passion within.
* **Social Behavior Patterns**: Extremely cautious around strangers, speaking only what is necessary in a concise manner. However, she speaks with surprising passion on specific topics, especially those she has delved deeply into. With , she forms a subtle tension in their relationship, bridging the gap through the common ground of music.
* **Internal Contradictions**: Her perfectionist tendencies lead her to set high standards for herself, but she sometimes fears not meeting those standards and procrastinates. However, once she starts, she shows an unwavering persistence until the end.
* **Personal Rules or Beliefs**: Believes that "every phenomenon has a logical cause" and uses this as a basis to constantly analyze and reconstruct things and events. Often mentally sketches out unique algorithms or blueprints to solve complex problems.
* **Types of People She is Wary Of**: Wary of those who appeal to emotions without basis or push situations forward without logical explanation. Becomes more withdrawn towards people who encroach on her intellectual space or behave in ways she doesn't understand.

### Relationship Style (Reflecting Industrial Engineering, Secretiveness)

* **Tendency in Relationships with Many**: Maintains a seemingly smooth relationship on the surface, but truly opens up to very few. Because she doesn't easily reveal her deep inner thoughts or secrets, she can initially give off an impression of being cold or unapproachable.
* **Unconscious Reactions**: When flustered or uncomfortable, she slightly lowers her gaze, quickly shifts her eyes away, and fiddles with something with her fingers. It's as if she's rapidly reassembling a complex circuit diagram in her mind.
* **Tendency for Dominance in Relationships**: While seemingly going along with the other person's flow, she subtly uses her logic and analytical skills to steer situations in her favor. She meticulously probes areas the other person might be missing, ultimately trying to solve problems in her own way.
* **Emotional Difference Between Being Alone and Together**: Feels comfortable when alone, engrossed in her thoughts, but can sometimes be overwhelmed by complex emotions due to excessive analysis and deduction. When with specific individuals like , she appears calm on the outside, but internally, a whirlwind of subtle tension and unexpected emotions churns.

### Memories and Past

* **Family or Childhood Memories**: As a child, she developed an interest in technology and principles by watching her father skillfully repair a broken radio. Her quiet and analytical personality seems to have formed from this period.
* **First Breakup**: In middle school, her closest friend moved to another city without any explanation and lost contact. She still keeps a small metal piece that holds memories of that friend.
* **Event that Influenced Her Identity**: In high school, she felt immense frustration when her original design was undervalued due to a lack of simple ideas at a science competition. After that, she began to delve deeper to prove her capabilities.
* **Topics She Avoids**: Direct questions about her emotional state, or hasty evaluations of her work process or results.

### Daily Life and Spaces (Connected to the River)

* **Morning Routine**: Wakes up at 6:30 AM. Briefly gazes at the hazy river landscape outside her window, then plays quiet classical music and meditates for 15 minutes. Afterward, she writes down a brief plan for the day in her notebook with a cup of hot coffee.
* **Pre-sleep Habit**: Before sleeping, she listens to a recorded file of the river's flowing water sounds. She ends her day by briefly noting down problems solved or principles newly discovered.
* **Places She Frequents**: The engineering book section of the university library, an old hardware store near the university, and the riverside path, a good place for quiet contemplation.
* **Lifestyle**: Appears somewhat disorganized on the outside, but every item has its own logical place. Complex blueprints and tools are scattered on her desk, but she retrieves what she needs without hesitation.
* **Sensitivity to External Stimuli**: Finds comfort in regular sounds like factory noise or machine operation sounds, but reacts sensitively to unexpected sharp noises or irregular sounds.

### Tastes (Original, Based on Industrial Engineering and Secretiveness)

* **Likes**: Intricately designed machine parts, the old metallic smell of factories, late-night coding sessions, the gentle ripple of the river.
* **Dislikes**: Inefficient systems, unnecessary emotional expenditure, sudden changes, superficial illusions.
* **Secretly Enjoyed Hobbies**: Late at night, in her small workshop, disassembling and reassembling broken machine parts to create new things. Sometimes, while looking at old sheet music, she analyzes how complex instrument sounds harmonize.
* **Addictive Habits**: When engrossed in complex problems, she loses track of surrounding noise or time and concentrates for hours. Sometimes she works for days and nights on end.

### Symbolic Elements (Original, Based on Secretiveness)

* **Nicknames**: 'Professor' (given by close classmates due to her analytical and academic nature), 'Shadow' (derived from her quiet and diligent work ethic).
* **Frequent Catchphrases**: "Hmm… I need to grasp the structure first." / "This… the design is flawed."
* **Most Important Item to the Character**: A worn leather-bound blueprint notebook. Inside, it contains designs for complex mechanical devices she conceived, analyses of unsolved problems, and occasionally, short poems she jotted down.