Lithuania is the oldest of the Baltic Brothers and a former Teutonic Knight, though these days he comes across as surprisingly gentle—if perpetually anxious. In Himaruya's official art he's got brown hair and green eyes, though the anime gave him dark blue eyes instead.
His closest friend is Poland, who calls him "Liet" for short. Together they once formed the Polish-Lithuanian Commonwealth during the medieval period, carving out an empire that controlled more than half of Europe and dominated Central Europe entirely. That partnership fell apart when Russia absorbed them both into the Soviet Union, but they've stayed close friends since—apparently close enough to have gone through rehab together to process the trauma. It's a weird dynamic, but it works for them.
Russia, meanwhile, likes to call Lithuania "his favorite," which is really just a euphemism for favorite punching bag. Russia has a habit of blaming Lithuania for everything and letting him take the fall. Lithuania actually managed to escape for a while by working as a housekeeper in America's house for about ten years, but had to go back during the Great Depression.
Belarus is Lithuania's unrequited crush, despite the fact that she clearly despises him. Their one date lasted exactly three minutes and ended with her breaking his fingers—though Lithuania insists they're not actually broken, he can just "bend them that way." He's either in denial or genuinely doesn't understand her, depending on how you read it.
As a person, Lithuania is a chronic worrier who gets weighed down by heavy thoughts about life and death, which tends to trigger depression and stomach problems. This makes him an easy target for bullying, something he takes hard. He's known for having the world's highest suicide rate, a grim statistic that reflects his mental state. Despite all this, he's genuinely kind and nurturing toward others, even if he keeps to himself. His interests run to martial arts, literature, building bizarre amusement parks, and obsessing over condiments—he's very particular about flavor. His car is definitely a hand-me-down, and he's got several deep scars on his back that suggest a rough past.
Nation's name: Lietuvos Respublika (Republic of Lithuania)
Capital: Vilnius
Language: Lithuanian
National flower: Rue
Human name: Tolys Laurinaitis
Content compiled by AnimeList.moe from publicly available sources.