Tomorrow will be the first Christmas away from home for the King Country-raised Navy steward. Her mother, Rosemary, said Theresia would be sorely missed.
"She's the one who always bonds with everybody and smooths everything over," she said, laughing.
Mrs Muller is worried about her first-born being away, but accepts that the military is "her chosen career".
She has sent her daughter presents, and Theresia's aunt Catherine sent 2kg of eskimo lollies and peanut slab chocolate bars down to Antarctica to curb the homesickness.
Leading Steward Muller said the Kiwi sweets went down a treat.
"I went for a walk around base giving everyone eskimos and left them in a bowl and people have been coming and grabbing them."
Leading Steward Muller enlisted in the Navy straight out of Sacred Heart Girls' College in Hamilton East and began working as a steward serving officers and hosting functions and parties - "the PR side of things," she explained.
But in October, she jumped at the chance of the posting in Antarctica, and will head home about March.
Tomorrow, she will sit in the communications centre, liaising with the groups "out on the field".
"We keep in contact with them, talk to them, make sure they've got everything they need ... We're really the only people that they get to talk to," she said. "Sometimes I tell them jokes and stuff like that, just to make sure they're okay."
