Her alter ego when she was hiding was Shrike, but she decided to not hide anymore hence Ana. Jack is too invested into his srs bsns jig to go back and Reaper abandoned his name.I have a lore question y'all: why does Ana not have a codename like most of the other founding Overwatch members? (or, if she does and I don't know it, why isn't she called by it now, unlike Soldier 76 or Reaper)