who is the reindeer in frozen

Frozen is a popular Disney animated film that features a group of magical reindeer who help the protagonist, Princess Anna, on her quest to save her sister, Queen Elsa, from her icy powers. The reindeer named Sven is Anna's faithful friend and companion, and he plays a crucial role in their journey. The other reindeer in the film include Kristoff's pet reindeer, who is called "Sven" in real life, and a mysterious reindeer who possesses the power to melt ice.