Watch over our child. Guide him safely from the ways of harm.
—Tsar and Tsarina to Nightlight
Tsar and Tsarina were beloved by all of the People of the Golden Age, by their own people and by the other Great Houses. They loved their son dearly and as Tsar would show him the wonders of the heavens through his telescope, Tsarina would read to him from her Primer of the Planet by the light of the Giant Glowworms.
During the Golden Age the universe was ruled by the Constellations, groups of stars and planets led by great, benevolent families who governed with imagination, fairness and flair. Of all these regal families, the House of Lunanoff was the most beloved; if The Golden Age had true royalty, it was Tsar and Tsarina Lunanoff.
The Lunanoffs pledged to rid the evil from The Golden Age, and together with other Constellations, they built a prison out of lead in the farthermost regions of space. There, they entombed the criminals of the cosmos in eternal darkness until they became little more than shadows. And the Golden Age flourished.
However, Kozmotis Pitchiner, the hero of the Golden Age and sole gate keeper of the prison was tricked into releasing the shadows and being corrupted by them, turned him into the Nightmare King, Pitch Black. He swore vengeance on the Constellations and attacked each of the Houses one by one, saving the Lunanoff family for last and threatening to turn the Lunanoff Prince into his Fearling Prince. In order to save their son, Tsar and Tsarina built a ship that would sail through the stars and fled to Earth, where the ship would disguise itself as a moon and forever evade Pitch's sight.
Guardians of Childhood
In The Man in the Moon, Tsar and Tsarina are aboard the Moon Clipper, making their way to Earth with their son, his protector Nightlight and a crew of Moonbots, Moonmice, and Giant Glowworms. They are then attacked by the Nightmare Galleon, lead by Pitch and his crew of Dream Pirates. The Moon Clipper fights back and Tsar and Tsarina order Nightlight to take the baby to a hidden nursery deep within the darkest tunnels of the ship. They and the crew fought valiantly, but are overwhelmed and captured. All seemed lost, until Nightlight rejoins the battle and pierces Pitch's heart with a blade made from the tears of the Prince. There was a huge explosion and a blinding light, and Pitch, Nightlight and MiM's parents were lost.
After the battle, MiM crawled out from nursery and saw a group of new stars, shimmering above him. He stared at them until he was sure. His mother and father were there. Far away, but still there.
| Rise of the Guardians Wiki has|
related to Tsar and Tsarina.
- North now possesses Tsar Lunar's sword, one of the five relics of the Moon Clipper.
- Bunnymund, who helped make the Egg of Creation, entrusted its light to Tsar, who would later give it back to Bunnymund after his race was wiped, so he could flee and create a new planet.
- Tsar is the Russian title given to an emperor.
- Tsarina is among the characters that were inspired by William Joyce's wife. The others are: Mother Nature , Toothiana  and a warrior mermaid .