Taleyl

As the [A Team] explored the Petitioner's Path, they encountered armored warriors of the Drow with armor that resembled more basic forms of Taleyl's armor. Up to this point, this is the only hint to who Taleyl really is, aside from the brief mention of her female identity. 

Spoilers

Her Drow heritage is confirmed once Claurion introduces the [A Team] to the 3 members of House Solus, revealing her & King Dae Solus II true identities.