She is white Akita Inu like one of Gin's Siblings and Kinumaru. Although she is female, she looks very masculine and lacks eyelashes.
She's a really quiet and strong female.
Ginga Densetsu Anju To Jirōmaru
One day, Yuki leaves with her owner to the mountains in search of gold. When returning from the gold rush, her master is bitten by a snake and they fall into a ravine. Both of them are trapped in the ravine and as a way to get herself out from underneath a rock. Later, Yuki wakes up and finds the back of her legs trapped in the rocks below. Yuki trying in vain to scream for help, and she bites her own leg off and escapes to get help for her master. Yuki came back to home where Anju and the puppies lives.
She was found by a man who took her back her home. The postman and Anju are trying to improve Yuki's wounds, but she is dying. Yuki tells her puppies about Yoshito's whereabouts and tell them about her grandfather, Riki. Yuki soon die from her injuries, and the next night Anju bury her in the yard of the house.