Vodyanitsa and Alyosha.

Age: 16 years old (this is not exact)
height: 165 cm.
She has long grey-blue (green-blue) hair, which is decorated with white flowers and pearls.
Instead of ears there are blue fins.
There is a scattering of crystals on her body (this seems to be a hint at her belonging to the race of fairies, specifically to the Water Imp clan, the Daclos clan).
She wears a light dress in azure and pearl tones. The outfit features nautical details (shells) and patterns reminiscent of a musical staff and a treble clef.
Character:
On the one hand, Vodyanitsa is the prima donna of the Royal Opera Company in Snezhnograd, and she has a stunningly beautiful voice. The opera house audience is delighted with her performances.
But behind the image of the star lies another, deeper and more mysterious side. She also dislikes the established order of the snow and the laws themselves.
She united with Alyosha to oppose the queen’s plans.
Vodyanitsa's voice contains not only power, but also danger - it can enchant the listener.
Performs at the Royal Theatre in Snezhnograd.

Age: 17 years (approximately)
Height: 180 cm.
Appearance
Alyosha is dressed in warm clothing suitable for the harsh snows of Snezhnaya. The following details can be seen in his outfit:

a warm sweater with white fur and a hood that looks like a wolf's face;
long scarf;
gloves.
The clothing's color scheme includes red, white, and blue. It's believed the overall look may have been inspired by the culture of the Turkic peoples of Southern Siberia.
Character:
Tough and independent, he has spent his entire life in the snow, thrives in the wild, and is a master of weapons (including a rifle). His true enemy is the merciless cold, and he regularly ventures into the snowy wilderness to forage for food and bring hope to people.
Sincere and courageous. The villagers remark on his bravery: there are stories of him saving a man from a monster.
Responsive. Despite his sternness, there's a warmth to him—it's said his sincerity can "melt the snow that binds people's hearts."
Overall, the image emerges of a person who is used to relying only on himself, but at the same time remains kind and ready to help.
He also has a husky dog ​​named Tugarin.
There is a brown rifle.