This Information was found by many sources. Most from the movie itself. A lot of us depend on other sites to tell us who is who. But are they correct? Here is what I found from the movie, trailer, credits, and common knowledge.
Balto
- This is confused probably by newbies only but I'll put it anyway. voiced by Kevin Bacon, is a young adult male wolfdog, a mix of Siberian Husky and Arctic Wolf. He is much despised by almost everyone in town because of his wolf heritage. All he wants is to fit in, but he is not accepted by the dogs, as well as humans, who hate and fear him. The only ones who accept him for who he really is are Muk and Luk, Boris, Jenna, and Rosy. Balto loves dogsled racing, leading to a frequent opinion in fanfiction that his father was a sled dog, possibly a lead dog. When a diphtheria epidemic hits Nome and the sled team gets lost while bringing in the only available antitoxin, he goes out to find them and help get the medicine through.
Boris Goosavon
- voiced by Bob Hoskins, is a somewhat grumpy Russian snow goose. He is typically somewhat of a coward, but when it is necessary he can display great courage. His main contribution, though, is his insight. He seems to consider himself Balto's caretaker, telling him that, "I'm staying here until I'm sure you can stand on your own four feet." However, when Balto must continue on alone to search for the missing sled team, Boris encourages him: "A dog cannot make this journey alone. But maybe a wolf can." Frequently bothered by the affectionate Muk and Luk, who call him "Uncle Boris." He also mentions his name before falling through the window in the beginning. He states "Boris Goosavon is no Spring Penguin e'der!"
Jenna
- voiced by Bridget Fonda, is a beautiful purebred young, female Siberian husky. Jenna is perhaps the only dog in Nome who gives any thought to Balto (except for Steele, who seems to spend much of his time seeking out and bullying him). She is the unwilling object of Steele's lustful interests, seeming from the start to show more interest in Balto. She helps Balto on his journey by following him into the wilderness to tell him that Eagle Pass is blocked, and ultimately intervenes at the crucial moment during a fight with a bear. The end of the movie leaves little doubt that the two of them are very much in love. She was even ready to sacrifice her life to defend Balto from a bear.
Rosy
- voiced by Juliette Brewer, is Jenna's owner. In a town that hates and fears Balto, Rosy is possibly the only human in Nome to see anything in him other than a mangy stray half-breed. Rosy is a cheerful and kindhearted child, and when she comes down with diphtheria, Balto is quick to do everything in his power to help save her and the other children.
Steele
- voiced by Jim Cummings, is the lead dog of Nome's championship sled dog team and Balto's enemy. He is pompous, rude, and willing to do anything to achieve his goals. He often picks on Balto about being a wolfdog and frequently shows affection to Jenna. Because of Steele's large size, he is mostly likely to be an Alaskan Malamute. He is a handsome dog and many of the female dogs in Nome liked him until the end of the movie when they all found out his true nature and turned their backs on him.
Muk & Luk
- both voiced by Phil Collins, are a pair of polar bears who are outcasts similar to Balto, who is their friend, and Boris, who they call "Uncle Boris" and treat as a cherished relative, although Boris doesn't really like it. Muk and Luk are afraid of water and believe that they cannot swim, but over the course of the movie discover that they can swim when it counts. Luk only makes vocal sounds but does not "talk"; his sounds are translated by Muk and can later also be understood by Boris.
Kaltag
- voiced by Danny Mann, Often struggles to find the right choice of words, hits Star when he joins in with a foolishly obvious comment ("That's good!" or "You won!") Kaltag promptly hits him. In the end, when the three of them (and the whole town) are praising Balto, Star's comment is "They should make a statue of him!" This time, Kaltag (after appearing as though he's about to hit Star) simply smiles and tells him: "You said it!"
Nikki
- voiced by Jack Angel, is the Jamacian accented husky who seems to let Kaltag take the lead role as the "Best" back-up dog for Steele. He is the dog who runs on Steeles team behind Star. He starts convorsations for the rest of the trio mostly. Starting up with ("That sun of a..."), making Kaltag start up with the whole adjective joke.
Star
- voiced by Robbie Rist, is the crazy, small Alaskan Klee Kai of the trio. He makes mistakes often and is quite clumbsy. He starts an avalanche while Balto and the team are walking through a snowy gorge. In the end of the film, he suggests that they build a statue of him after Nikki starts with ("Endurance, Fidelity, Intelligence-").
Dixie
- voiced by Sandra Dickinson, is a female dog and one of Jenna's friends. She has a huge crush on Steele, shown when trying to impress him with her new collar. When she and the other dogs discovered Steele's true nature, they turn their backs on him.
Sylvie
- voiced by Sandra Dickinson, is a female Afghan Hound is also one of Jenna's friends. She admires Steele, until she, along with all the other dogs, found out about who he really was.
Aniu
- Aniu is the white wolf that is seen after Balto falls from the mountain, trying to keep the medicene safe. She is mentioned in the second movie to be his mother. Aniu howls with Balto, trying to help him find out who he is. Beckoning Boris's words "A dog cannot make this journey alone....But maybe a wolf can"
After MathThe story opens with a live-action segment in Central Park, New York City. A grandmother (Miriam Margolyes), her granddaughter (Clayton Kirk), and Blaze, their pet husky, search for the Balto memorial statue. The granddaughter hands her grandmother a musher's hat, and the grandmother begins telling the story of Balto.
I found that the grandmother, was taking the role of "Rosy" who was sick with diptheria during the film. In the end of the move, just before the credits start rolling, she states, "Thank you Balto, I would have been lost without you". Hint, Hint.
ALSO, I was watching the film on DVD and turned on the credits. At the end, with the grand daughter and Rosy, they are reading the stature.
The Granddaughter reads:
Dedicated to the indomitable spirit of the sled dogs...
Then Rosy speaks: that relayed antitoxin six hundred miles over rough ice, across treacherous waters, through Arctic blizzards from Nenana to the relief of stricken Nome in the Winter of 1925.
When the granddaughter spoke, the letters on the screen came as
[
Sylvie] Endurance · Fidelity · Intelligence
So the grandmother is Rosy
And the granddaughter is named Sylivie.
Voice Credits"Dad, I'm cold" is shone while Jenna, Dixie, and Sylvie are walking down the road. Obviously the start of the Diptheria scare.
http://i33.tinypic.com/20887rb.png"Steele, Star! Lets go!" The musher yells as the team took off with the medicene. So Star is the dog behind Steele.
http://i37.tinypic.com/1zw2f52.png[Kaltag] "C'mon Balto! Yus can make it!" Is shone in the subtitles while Balto is pulling the medicene up the mountain. Subtitle editors can be wrong somtimes though
http://i37.tinypic.com/30jn42b.png(I had to make these screen grabs smaller to fit the screen

My camera makes them 10x the desktop size. These where snapshotted with the subtitles on.)
This information was provided from the following
Subtitles
Credits
Knowledge
Talking in the film
THIS CAN NOT OR CAN BE CORRECT. I AM NOT RESPONSIBLE FOR ERRORS, I JUST PUT WHAT WAS GIVEN! Thank You XD