Moira

Moira is a Talon scientist from the Overwatch universe. She is the leader of the Science Alliance.

First Act (Science Begets Death)
Moira has started the alliance. How she got Symmetra and Mercy on her side is unknown, but she seems to be a capable leader. She has brought the AI A.L.P.H.A. to the surface. She ordered the death of Papyrus, Gaster, and Sans.

Second Act (Worlds Break)
After berating Calamitas, she was killed by Calamitas via tendrils.

Relations
Calamitas: She seems to know the witch rather well, and treats her as an equal, smarts wise. She seems to depend on her.

Mercy: She despises Mercy, but will put up with her for the sake of science.

Xerosic: She gets good vibes from him. He's certainly loyal to the cause.