Telegraph Operator

Balto
He doesn't play much of a role but he is first seen spreading the massage that Steele is an impressive dog with the morse codes!

He'll be seen again when Nome is having a much number of sick children and requires medicine from another location, he'll was told that planes won't have their engines started because of the wind and the train cannot go as far. So he was asked to pile up the fastest dogs to get it.

Soon, he'll be noted that Steele and his team are missing and Nome was slowly losing hope for all the sick kids. Near the end, he'll rise the lamp to make everyone aware that the sled team is back.

Relationships
(If certain characters aren't here, that means that they've not had any thoughts about them nor interacted with them. Feel free to summarize their perspective (Fanfictions NOT included).)

Morse
They're never seem spending time with each other but presumably he cares about him.

Nome
He must likely worried about Nome as what the consequences will happen to the children.

Steele
He never interacts with him in person but he's mainly aware that do to his states in the race, he'll be sent to retrieve the medicine.