Description
Lithuania appears as a tall young man with wavy, shoulder-length brown hair, sometimes tied back. His eye color transitioned from blue in early animated depictions to green in later adaptations, matching the manga. He possesses a slender yet strong build, bearing deep scars across his back heavily implied to stem from Russia's harsh treatment during historical conflicts.

Personality-wise, Lithuania presents as introverted, exceptionally serious, and prone to overthinking, often resulting in stress-induced stomachaches. He struggles to grasp humor yet displays resilience under pressure. Despite his reserved nature, he exhibits kindness and a protective instinct, particularly toward Estonia and Latvia as the eldest Baltic state. Historically, he demonstrated formidable strategic prowess in battles like Grunwald, outmaneuvering Prussia to rescue Poland. His interests encompass martial arts, literature, chess, and driving a second-hand car.

Lithuania's earliest history involves medieval conflicts against the Teutonic Knights, where Prussia's aggressive attempts at Christianization fostered lasting resentment. A pivotal union began with Poland through the marriage of Grand Duke Jogaila and Queen Jadwiga, forming the Polish-Lithuanian Commonwealth. Poland frequently dominated him during this era, though their partnership proved militarily effective. Defeat in late-18th-century wars led to the Commonwealth's partition and Lithuania's forced annexation by Russia, initiating prolonged subjugation marked by psychological torment and physical abuse.

Following World War I, Lithuania gained temporary independence. He worked as a housekeeper for America to stabilize his economy, describing this interlude as "heaven." The Great Depression forced his return to Russia, leading to Soviet control despite real-world historical inaccuracies regarding the annexation timeline. Under Soviet rule, he handled paperwork and domestic chores alongside fellow Baltics, constantly navigating Russia's oppressive presence and Belarus's hostility. During World War II, he risked contacting Poland to warn of Soviet invasion plans, though Poland dismissed his concerns.

Post-Soviet independence saw Lithuania reconnect with Poland to rebuild his nation, revealing significant personal changes in both. Modern narratives depict him strengthening ties with Estonia and Latvia while maintaining a cautious distance from Russia, who persistently expresses possessive interest. Key relationships include:
- **Poland**: A complex bond mixing camaraderie with friction, symbolized by Poland's nickname "Liet" and mutual discoveries of each other's hidden scars during reunions.
- **Russia**: Characterized by fear and trauma from centuries of control, with Russia persistently stalking him despite Lithuania's desire for autonomy.
- **Belarus**: Features unrequited affection from Lithuania, met with her violent resentment rooted in historical conflicts.
- **Prussia**: Defined by childhood bullying and battlefield enmity, particularly during the Teutonic era.