Milya

Katerina's childhood and best friend. She is simple-minded, but also is very sharp. You could say that she overall is "Ultra Super in Her Pace". Unlike Katerina, she can make a mizuame. Almost inseparable with Katerina and always support she, even in hardest times. Hates canned herring.

Spoiler

After capture by Japan likes to go to the Headquarters sweets shops.

"I'm always with you, Katerinochka..."