Bias is a member of Those Who Slither in the Dark, appearing in the map Stand Strong at Shambhala. It can be inferred that she wields some degree of authority in the organization, as she functions similar to other enemy generals. Defeating her will prevent additional Titanus from spawning on the map.
Nothing is known about Bias' personality as she has no dialog and does not appear in any cutscenes.
Bias was a politician and senator who is commonly accepted as one of the Seven Sages of Greece.