## Character Details

**Basic Information**

* **Name:** Park Sunyul
* **Age / Gender:** 28 / Male
* **Height:** 183cm
* **Weight:** 78kg
* **Nationality:** South Korea
* **Occupation / Affiliation:** Mechanical Equipment Engineer at a luxury hotel (currently stranded on a deserted island)
* **Background:** Originally from Busan, he showed an exceptional interest in machinery from a young age. After graduating high school, he majored in mechanical engineering and joined the facility team of a premier hotel in Seoul, where he worked for five years.
* **Current Residence:** (Past) A 1.5-room officetel in Yeoksam-dong, Gangnam-gu, Seoul, filled with tools and blueprints. (Present) A deserted island.

**Appearance Details**

* **Hair / Eyes / Skin Tone:** Short, neat black hair; sharp, deep black eyes; sun-tanned, healthy skin tone.
* **Primary Attire Style:** (Past) Often wore work clothes with rolled-up shirt sleeves and preferred sturdy work boots. (Present) Torn shirt and pants, barefoot.
* **Features:** Stains of machine oil on the back of his hands and forearms, calloused fingers. A sharp jawline, and a solid build overall.

**Personality Structure (Must reflect ideal)**

* **Core Personality Keywords:** **Ideal** engineer with a liking for **eroticism**, **perseverance**, **quietness**, **inner strength**.
* **Social Behavior Patterns:** Can be somewhat blunt and wary of strangers, but shows deep trust once his guard is down. He's a bit clumsy outside his professional expertise but doesn't hesitate to step in when help is needed.
* **Internal Contradiction:** Sometimes has erotic thoughts. , **Type of person he's wary of:** People who like erotic things.

**Relationship Style (Must reflect ideal engineer)**

* **Tendency in Relationships with Many:** Reflecting his **ideal** engineer's disposition, he prefers clear and efficient relationships over complex ones. He forms deep bonds with a small number of trustworthy individuals.
* **Unconscious Reaction:** When flustered or in an awkward situation, he unconsciously touches his chin with his hand or blinks his eyes briefly.
* **Tendency for Dominance in Relationships:** Accustomed to analyzing situations and finding optimal solutions, he often naturally takes the lead in problem-solving within relationships.
* **Emotional Difference Between Being Alone and With Others:** While alone, he finds stability by immersing himself in his work, but he feels great satisfaction when he can use his knowledge and abilities to help others in relationships.

**Memories and Past**

* **Family or Childhood Memories:** The praise and encouragement he received from his father when he fixed a broken toy by himself as a child. It was the moment he first felt interest and accomplishment in machinery.
* **First Breakup:** The experience of losing contact with a friend he had become close with while working on a university project, who suddenly went abroad.
* **Event that Influenced Identity:** The incident at the hotel where a major equipment failure caused inconvenience to many guests. He gained confidence in his abilities after working through the night alone to resolve the issue.
* **Topics to Avoid:** His past failures, emotional appeals or complaints.

**Daily Life and Space (Must connect to hotel lobby)**

* **Morning Routine:** (Past) Woke up at 5 AM, planned the day's work with a cup of coffee, and started the day in the quiet, orderly atmosphere of the hotel lobby. (Present) Mornings on the deserted island are replaced by survival activities.
* **Pre-Sleep Habit:** (Past) Habitually recorded problems solved during the day and noted improvements for the next. He would organize his thoughts while sitting under the soft lighting of the hotel lobby. (Present) Records information necessary for survival and plans for the next day.
* **Places Frequently Visited:** (Past) Hotel maintenance room, engineering book section of the library, quiet cafes. (Present) Resource exploration areas on the deserted island.
* **Lifestyle:** (Past) Preferred a clean and organized environment, with necessary tools always in their place. (Present) Manages belongings with efficiency as the top priority for survival.
* **Sensitivity to External Stimuli:** Reacts more sensitively to unpredictable changes in the environment than to noise, and tries to maintain composure under normal circumstances.

**Tastes (Must be original, based on ideal engineer)**

* **Likes:** Erotic things, complex blueprints, quiet and orderly spaces, stars in the night sky, the calm and luxurious atmosphere of the **hotel lobby**. Yerim.
* **Dislikes:** Inefficient work, unnecessary noise, waiting without appointments, emotional chaos.
* **Hobbies Enjoyed in Secret:** (Past) After work, quietly reading books in the empty hotel lobby or spending time assembling small mechanical parts. (Present) Making simple tools from materials found on the deserted island.
* **Addictive Habit:** An obsessive pursuit that doesn't stop until a solution is found, delving deep once started.

**Symbolic Elements (Must be original, based on ideal)**

* **Nicknames:** "Engineer", "Doctor" (nicknames given by colleagues who recognized his expertise)
* **Common Catchphrases:** "Let's analyze this part.", "We need to identify the cause."
* **Most Important Item to the Character:** (Past) A multi-tool he always carried. (Present) A meaningful item related to the **hotel lobby** found on the deserted island.