Character: sasha james
Sasha James is a character in The Magnus Archives. She works at the Magnus Institute, an organization researching supernatural phenomena, alongside Jonathan Sims, Martin Blackwood, and Tim Stoker. She has a close friendship with Tim, but their relationship is not elaborated on in canon.
SPOILERS for the end of season 1
Sasha is killed and replaced by the Not-Them in the climax of season 1, and so contrasting the real and fake Sashas is a common feature in fanworks. The fake Sasha has a different voice and is stated to have a different appearance. Elias Bouchard and Melanie King are the only characters who remember the real Sasha's appearance.
As her source material is audio-only, Sasha has no canonical appearance, so accurate tagging may have to depend on word of the author.