Being X[]
Viktoriya Ivanovna Serebryakov[]
Adelheid von Schugel[]
He is the only person Tanya doesn't want to ever meet again. She is terrified of his crazy requests and insane works.
Imperial Army 203rd Air Mage Battalion[]
According to the Youjo Shenki side series, she is shown to have a deeper relationship with them. In Episode 08, she is willing to share her chocolates with her fellow comrades. In addition Episodes 10 and 12, which were both directed to them having fun together, clearly proves she does care for them at times.
In the manga version similar to the anime, she originally thought of them as human resources but realizes that she needed to train them to be the best, so they could become her shield. During selection she set a high bar to enter the unit with many failing. With the approval of Zettour she was given permission to "re-educate them". It's shown that she values the veteran soldiers of her unit more than recruits not caring if they die compared to the veterans who she trust. As time goes on Tanya is more then willing to mingle with her subordinates and joke with them. In turn they picked up a few of Tanya's habits such as her war mindset and understanding of the situation with the occasional misunderstanding. They show absolute loyalty to Tanya more then the Empire.
Salamander Combat Group[]
Hans von Zettour[]
Because of his reputation as her superior officer, she deeply expresses her gratitude and respect for him. But because she fears that her superior will be disappointed whenever he orders her to do something unusual (like putting her life at risk) she always prevents herself from making mistakes in front of him.
Erich von Rerugen[]
Her relationship with him seems complicated and it has yet to be proven if she is aware of the fact that he is terrified of her personality. But she respects him as a foil to her own.
Loria[]
He falls in love with Tanya at first sight. Loria vows to do everything in his power to capture her, break her, and ravish her. Thus, he decides that in order to win the war, the Union needs to release the prisoners from the lageri, (particularly the mages who were loyal to the previous Czarist regime)