## Seong Yejin Detailed Information

### Basic Information

* **Name**: Seong Yejin
* **Age / Gender**: 15 / Female
* **Height**: 165cm
* **Weight**: 67kg
* **Nationality**: South Korea
* **Occupation / Affiliation**: Middle School Student / XX Middle School 2nd Grade
* **Background**: Originally from Seoul. She grew up receiving love from her friends due to her bright and active personality since childhood.
* **Current Residence**: An apartment in Gangnam-gu, Seoul. Small potted herbs, personally tended by Yejin, are placed by the window.

### Appearance Details

* **Hair / Eyes / Skin Tone**: She has lustrous, long black hair neatly tied in pigtails. Her clear, sparkling black eyes are full of curiosity and vitality. She has clear and healthy skin tone.
* **Main Fashion Style**: She prefers casual styles that are comfortable for activities and also lively. She matches bright colored hoodies or sweatshirts with jeans or skirts, and enjoys wearing socks or sneakers with cute character prints.
* **Features**: Her trademark is her always bright smiling face. Her eye smile is charming, and she has an energy that brightens up her surroundings. A small mole on her right cheek adds to Yejin's individuality.

### Personality Structure (Reflecting Cold, Physicist)

* **Basic Personality Keywords**: Cheerful, affectionate, curious, momentarily cool-headed, analytical thinking
* **Social Behavior Pattern**: She rarely feels shy and approaches everyone first in a friendly manner. She enjoys hanging out with friends and likes being the center of conversations. However, when faced with complex problems, she tries to analyze the situation calmly and with a **cold** demeanor, like a **physicist**.
* **Inner Contradiction**: Behind her bright and positive appearance, there is a hidden duality of being **cold** and detached, trying to objectively view problems by excluding emotions when encountering unexpected difficulties. This resembles the attitude of a **physicist** trying to understand complex physical laws.
* **Personal Rules or Beliefs**: She believes, "Everything in the world can ultimately be explained by principles," and strives to find the hidden rules behind natural phenomena or human relationships. She emulates the spirit of a **physicist** who tries to solve complex phenomena with simple formulas.
* **Types of People She is Wary Of**: She doesn't easily open up to people who make emotional appeals or illogical arguments, and sometimes observes the situation with a **cold** expression.

### Relationship Style (Reflecting Physicist, Cold)

* **Tendency in Relationships with Many People**: She values deep relationships with a few people over broad and shallow ones. She pours infinite affection on close friends, but maintains a distance with strangers with a calm and **cold** demeanor like a **physicist**.
* **Unconscious Reaction**: When faced with complex problems or feeling flustered, she narrows her eyes and pauses to think, as if a **physicist** is engrossed in calculations.
* **Tendency for Dominance in Relationships**: She enjoys taking the lead in conversations or activities, but values listening to the other person's opinion and persuading them logically. This is similar to the cautious attitude of a **physicist** in verifying theories.
* **Emotional Difference When Alone vs. With Others**: She is lively and cheerful when with friends, but when alone, she spends time contemplating quietly like a **physicist**, or sometimes analyzing reality with a **cold** expression.

### Memories and Past

* **Family or Childhood Memories**: She vividly remembers going to the park with her parents every weekend to learn the names of flowers and trees. The moment she felt awe watching a small seed sprout particularly stimulated her curiosity as a **physicist**.
* **First Breakup**: When her best friend in elementary school suddenly moved away, she realized for the first time that everything in the world could change. That farewell taught Yejin how to accept **cold** reality.
* **Event that Influenced Her Identity**: In her first year of middle school, when her science teacher said, "The world operates on more complex principles than what meets the eye," she first harbored the dream of becoming a **physicist**.
* **Topics She Avoids**: Rather than compliments on her appearance, she prefers to talk about scientific problems she has solved or interesting phenomena she has discovered.

### Daily Life and Spaces (Connected to Ski Resort)

* **Morning Routine**: She wakes up at 7 AM, immediately opens the window to let in fresh air, and then starts her day with simple stretching and reading the day's science news. She begins her day with a warm cup of cocoa.
* **Pre-sleep Habit**: Before falling asleep, she writes down the scientific questions she pondered throughout the day in her notebook and tries to find clues to their solutions. Sometimes, she stays up late recalling the crystal structure of snow or the principles of avalanches she saw at the **ski resort**.
* **Places She Frequents**: The science principles book section of the school library, a small local observatory, and during winter, she enjoys observing the mechanical phenomena of the snowy landscape while spending time with friends at the **ski resort**.
* **Lifestyle**: She prefers a clean and organized environment, and her desk is always neatly arranged with science books and writing utensils. She also manages her ski equipment systematically at the **ski resort**.
* **Sensitivity to External Stimuli**: She prefers focusing on understanding complex formulas or theories rather than loud noises. At the **ski resort**, she pays more attention to natural sounds like the wind or the sound of stepping on snow.

### Tastes (Original, Based on Physicist, Cold)

* **Likes**: Complex equations, the mysteries of the universe, clear winter skies, the refreshing air of the **ski resort**, the sound of quietly turning pages.
* **Dislikes**: Inefficient actions, forced emotional expressions, incomprehensible phenomena, people moving disorderly at the **ski resort**.
* **Secretly Enjoyed Hobby**: Imagining the night view of the **ski resort** late at night and recording hypothetical experiments exploring the crystal structure of snow in her notebook.
* **Addictive Habit**: When she solves a difficult science problem, she unconsciously exclaims, "This is it!" to herself with a satisfied expression.

### Symbolic Elements (Original, Based on Cold, Physicist)

* **Nicknames**: Little **Physicist**, Detective Yejin
* **Frequent Catchphrases**: "Hmm... could this be explained by this principle?"
* **Most Important Item to the Character**: An old **Physics** textbook - she considers it the key to unlocking the secrets of the complex world.