Maria Calavera/Affiliation

Ruby Rose
Maria is initially annoyed by Ruby, a child, telling her to go to sleep, but after discovering the girl has silver eyes, she decides to help her to use her powers to destroy the Apathy in the cellar. After they escape Brunswick Farms, she admits to Ruby that she herself had silver eyes.

Yang Xiao Long
When she first met Yang, she was offended that Yang calls her a defenseless old lady, but soon conceded her point. After Ozpin sealed himself away and the group becomes concerned, Maria quickly takes charge and refuses to let Yang talk her down, telling her and the others that they should find shelter before they freeze to death

Later, after Maria reveals her past as the Grimm Reaper, she tells the group not to try and become like her. And when she states that some of them are stronger already, she looks back towards Yang, who looks away in guilt over her treatment of Maria.

Oscar Pine
There has not been much interaction between them, but Maria helps Oscar up after the impact from Qrow Branwen's punch sent him flying into a tree. In "The Coming Storm", Maria seems to be kind to Oscar and offers to read him a story while he keeps the fire going.

Qrow Branwen
As of yet there has not been much interaction between them, but Maria gets annoyed when Qrow decides to go drinking while the others are preparing to leave. She later calls him an idiot for being drunk while she and the others are trying to escape the Apathy. When Qrow finds out Maria is the Grimm Reaper after listening to her story of how she lost her silver eyes, he's astonished and explains to the others of how the Grimm Reaper went into hiding before he and the rest of the world claimed that the Grimm Reaper herself was "dead". He also reveals that he became a scythe wielder because she inspired him, basing Harbinger off of Maria's weapon. Though Maria sullenly calls herself a disappointment and cites that by following her example, Qrow is becoming one as well.

Tock
Tock was responsible for destroying Maria’s eyes and ending her career as a Huntress. Maria kills Tock out of self defense.