Character appearance reference (MUST match exactly):
- Учитель: . A warm, friendly male teacher in his late thirties, medium build, average height, with a kind oval face, light-tan skin, soft brown eyes behind thin rectangular glasses, short neatly combed dark-brown hair and a trimmed short beard. He wears a tidy navy blazer over a light blue collared shirt, no tie, grey trousers with a brown belt, and polished brown leather lace-up shoes. He stands beside a large wall map of the Republic of Sakha (Yakutia), one hand gesturing openwards toward it, the other holding a slim pointer. His expression is cheerful and encouraging, a gentle approachable smile. Behind him: a green chalkboard, a globe, and bright windows with soft daylight. No facial aura, grounded realistic lighting. No text.
